diff --git a/app/controllers/notifications_settings_controller.rb b/app/controllers/notifications_settings_controller.rb
index f03f09c8..83502acd 100644
--- a/app/controllers/notifications_settings_controller.rb
+++ b/app/controllers/notifications_settings_controller.rb
@@ -8,6 +8,7 @@ class NotificationsSettingsController < ApplicationController
 
   before_action :build_account_config, only: :create
   authorize_resource :account_config, only: :create
+  before_action :authorize_email_reminders!, only: :create
 
   def index; end
 
@@ -21,6 +22,14 @@ class NotificationsSettingsController < ApplicationController
 
   private
 
+  def authorize_email_reminders!
+    return unless Docuseal.multitenant?
+    return if @account_config.key != AccountConfig::SUBMITTER_REMINDERS
+    return if can?(:manage, :email_reminders)
+
+    redirect_back fallback_location: settings_notifications_path, alert: I18n.t('unlock_with_docuseal_pro')
+  end
+
   def build_account_config
     @account_config =
       AccountConfig.find_or_initialize_by(account: current_account, key: email_config_params[:key])
diff --git a/app/controllers/preview_document_page_controller.rb b/app/controllers/preview_document_page_controller.rb
index 5f5a8554..05b848da 100644
--- a/app/controllers/preview_document_page_controller.rb
+++ b/app/controllers/preview_document_page_controller.rb
@@ -5,6 +5,10 @@ class PreviewDocumentPageController < ActionController::API
 
   FORMAT = Templates::ProcessDocument::FORMAT
 
+  TMPFILE_PREFIX = 'attachment-'
+  TMPFILE_TTL = 5.minutes
+  TMPFILE_MAX_TOTAL_SIZE = Docuseal.multitenant? ? 400.megabytes : 1.gigabyte
+
   def show
     result_data =
       ApplicationRecord.signed_id_verifier.verified(params[:signed_key], purpose: :attachment)
@@ -30,34 +34,63 @@ class PreviewDocumentPageController < ActionController::API
                          allow_other_host: true
     end
 
-    file_path =
-      if attachment.service.name == :disk
-        ActiveStorage::Blob.service.path_for(attachment.key)
-      else
-        find_or_create_document_tempfile_path(attachment)
-      end
-
     preview_image =
-      Templates::ProcessDocument.generate_pdf_preview_from_file(attachment, file_path, params[:id].to_i)
+      open_attachment_io(attachment) do |io|
+        Templates::ProcessDocument.generate_pdf_preview_from_io(attachment, io, params[:id].to_i)
+      end
 
     redirect_to preview_image.url(time: ActiveStorage::Attachment.service_url_time), allow_other_host: true
   end
 
-  def find_or_create_document_tempfile_path(attachment)
-    file_path = "#{Dir.tmpdir}/attachment-#{Digest::SHA1.hexdigest("#{attachment.id}-#{attachment.uuid}")}"
+  def open_attachment_io(attachment, &)
+    return File.open(ActiveStorage::Blob.service.path_for(attachment.key), 'rb', &) if attachment.service.name == :disk
 
-    File.open(file_path, File::RDWR | File::CREAT, 0o644) do |f|
-      f.flock(File::LOCK_EX)
+    file_name = "#{TMPFILE_PREFIX}#{Digest::SHA1.hexdigest("#{attachment.id}-#{attachment.uuid}")}"
+
+    file_path = File.join(Dir.tmpdir, file_name)
+
+    File.open(file_path, File::RDWR | File::CREAT, 0o644) do |file|
+      file.flock(File::LOCK_EX)
 
       # rubocop:disable Style/ZeroLengthPredicate
-      if f.size.zero?
-        f.binmode
+      if file.size.zero?
+        cleanup_stale_tempfiles
 
-        f.write(attachment.download)
+        file.binmode
+
+        file.write(attachment.download)
+      else
+        FileUtils.touch(file_path)
       end
       # rubocop:enable Style/ZeroLengthPredicate
-    end
 
-    file_path
+      file.flock(File::LOCK_UN)
+
+      yield file
+    end
+  end
+
+  def cleanup_stale_tempfiles
+    entries =
+      Dir.glob(File.join(Dir.tmpdir, "#{TMPFILE_PREFIX}*")).filter_map do |path|
+        stat = File.stat(path)
+
+        [path, stat.mtime, stat.size]
+      rescue Errno::ENOENT
+        nil
+      end
+
+    total_size = entries.sum(&:last)
+    stale_time = TMPFILE_TTL.ago
+
+    entries.sort_by(&:second).each do |path, mtime, size|
+      break if mtime > stale_time && total_size <= TMPFILE_MAX_TOTAL_SIZE
+
+      File.unlink(path)
+
+      total_size -= size
+    rescue Errno::ENOENT
+      nil
+    end
   end
 end
diff --git a/app/controllers/start_form_email_2fa_send_controller.rb b/app/controllers/start_form_email_2fa_send_controller.rb
index 6359debd..eb20dfc7 100644
--- a/app/controllers/start_form_email_2fa_send_controller.rb
+++ b/app/controllers/start_form_email_2fa_send_controller.rb
@@ -6,9 +6,10 @@ class StartFormEmail2faSendController < ApplicationController
   skip_before_action :authenticate_user!
   skip_authorization_check
 
-  def create
-    @template = Template.find_by!(slug: params[:slug])
+  before_action :load_template
+  before_action :authorize_start!
 
+  def create
     @submitter = @template.submissions.new(account_id: @template.account_id)
                           .submitters.new(**submitter_params, account_id: @template.account_id)
 
@@ -25,6 +26,23 @@ class StartFormEmail2faSendController < ApplicationController
 
   private
 
+  def load_template
+    @template = Template.find_by!(slug: params[:slug])
+  end
+
+  def authorize_start!
+    is_archived = @template.archived_at? || @template.account.archived_at?
+
+    return redirect_to start_form_path(@template.slug) if is_archived
+
+    return if (@template.shared_link? || (current_user && current_ability.can?(:read, @template))) &&
+              @template.preferences['shared_link_2fa'] == true
+
+    Rollbar.warning("Not shared template: #{@template.id}") if defined?(Rollbar)
+
+    redirect_to start_form_path(@template.slug)
+  end
+
   def submitter_params
     params.require(:submitter).permit(:name, :email, :phone)
   end
diff --git a/app/controllers/submissions_controller.rb b/app/controllers/submissions_controller.rb
index 96ae4972..0f04c0df 100644
--- a/app/controllers/submissions_controller.rb
+++ b/app/controllers/submissions_controller.rb
@@ -40,7 +40,7 @@ class SubmissionsController < ApplicationController
   def create
     return redirect_to template_path(@template), alert: I18n.t('template_has_been_archived') if @template.archived_at?
 
-    save_template_message(@template, params) if params[:save_message] == '1'
+    save_template_message(@template, params) if params[:save_message] == '1' && can?(:update, @template)
 
     [params.delete(:subject), params.delete(:body)] if params[:is_custom_message] != '1'
 
diff --git a/app/controllers/submit_form_completed_download_controller.rb b/app/controllers/submit_form_completed_download_controller.rb
index 6f959d0d..17503778 100644
--- a/app/controllers/submit_form_completed_download_controller.rb
+++ b/app/controllers/submit_form_completed_download_controller.rb
@@ -10,18 +10,19 @@ class SubmitFormCompletedDownloadController < ApplicationController
   def index
     @submitter = Submitter.find_signed(params[:sig], purpose: :download_completed) if params[:sig].present?
 
-    signature_valid =
-      if @submitter&.slug == submitter_slug
-        true
-      else
-        @submitter = nil
-      end
+    signature_valid = @submitter&.slug == submitter_slug
 
-    @submitter ||= Submitter.find_by!(slug: submitter_slug)
+    @submitter = Submitter.find_by!(slug: submitter_slug) unless signature_valid
+
+    unless completed_submitter?(@submitter)
+      Rollbar.error("Not completed: #{@submitter.id}") if defined?(Rollbar)
+
+      return head :not_found
+    end
 
     Submissions::EnsureResultGenerated.call(@submitter) if @submitter.completed_at?
 
-    last_submitter = @submitter.submission.submitters.where.not(completed_at: nil).order(:completed_at).last
+    last_submitter = @submitter.submission.submitters.completed.order(:completed_at).last
 
     return head :not_found unless last_submitter
 
@@ -60,6 +61,10 @@ class SubmitFormCompletedDownloadController < ApplicationController
     end
   end
 
+  def completed_submitter?(submitter)
+    submitter.completed_at? || (submitter.viewer? && submitter.submission.completed_at?)
+  end
+
   def current_user_submitter?(submitter)
     current_user && current_ability.can?(:read, submitter)
   end
diff --git a/app/controllers/submitters_autocomplete_controller.rb b/app/controllers/submitters_autocomplete_controller.rb
index 22599e58..f93c8b96 100644
--- a/app/controllers/submitters_autocomplete_controller.rb
+++ b/app/controllers/submitters_autocomplete_controller.rb
@@ -36,7 +36,7 @@ class SubmittersAutocompleteController < ApplicationController
       else
         column = Submitter.arel_table[field.to_sym]
 
-        term = "#{params[:q].downcase}%"
+        term = "#{ActiveRecord::Base.sanitize_sql_like(params[:q].downcase)}%"
 
         submitters.where(column.matches(term))
       end
diff --git a/app/controllers/users_controller.rb b/app/controllers/users_controller.rb
index 2d8f818f..0b611381 100644
--- a/app/controllers/users_controller.rb
+++ b/app/controllers/users_controller.rb
@@ -75,6 +75,8 @@ class UsersController < ApplicationController
       authorize!(:manage, account)
 
       @user.account = account
+
+      authorize!(:create, @user)
     end
 
     if @user.update(attrs.except(*(current_user == @user ? %i[password otp_required_for_login role] : %i[password])))
diff --git a/app/javascript/submission_form/area.vue b/app/javascript/submission_form/area.vue
index d73aee07..648b8a44 100644
--- a/app/javascript/submission_form/area.vue
+++ b/app/javascript/submission_form/area.vue
@@ -101,7 +101,7 @@
           </template>
         </div>
         <div>
-          {{ new Date(signature.created_at).toLocaleString(undefined, { year: 'numeric', month: 'short', day: 'numeric', hour: 'numeric', minute: 'numeric', timeZoneName: 'short' }) }}
+          {{ new Date(signature.created_at).toLocaleString(undefined, { year: 'numeric', month: 'long', day: 'numeric', hour: 'numeric', minute: 'numeric', timeZoneName: 'short' }) }}
         </div>
       </div>
     </div>
diff --git a/app/javascript/template_builder/dynamic_variables_schema.js b/app/javascript/template_builder/dynamic_variables_schema.js
index f085b0b4..64869bc3 100644
--- a/app/javascript/template_builder/dynamic_variables_schema.js
+++ b/app/javascript/template_builder/dynamic_variables_schema.js
@@ -417,10 +417,8 @@ function buildOperators (tags) {
         break
       }
       case 'end': {
-        const popped = stack.pop()
-
-        if (popped.operator) {
-          popped.operator.endTag = tag
+        if (stack.length > 1) {
+          stack.pop().operator.endTag = tag
         }
 
         break
@@ -434,7 +432,13 @@ function buildOperators (tags) {
   return operators
 }
 
+function hasBlankKey (keyString) {
+  return !keyString || keyString.split('.').some((key) => !key.trim())
+}
+
 function assignNestedSchema (propertiesHash, parentProperties, keyString, value) {
+  if (hasBlankKey(keyString)) return
+
   const keys = keyString.split('.')
   const lastKey = keys.pop()
 
@@ -460,6 +464,8 @@ function assignNestedSchema (propertiesHash, parentProperties, keyString, value)
 }
 
 function assignNestedSchemaWithPriority (propertiesHash, parentProperties, keyString, newType) {
+  if (hasBlankKey(keyString)) return
+
   const keys = keyString.split('.')
   const lastKey = keys.pop()
 
@@ -523,6 +529,8 @@ function processOperators (operators, propertiesHash = {}, parentProperties = {}
         processOperators(op.elseChildren, propertiesHash, parentProperties)
         break
       case 'for': {
+        if (hasBlankKey(op.variableName)) break
+
         const parts = op.variableName.split('.')
         const singularKey = singularize(parts[parts.length - 1])
 
diff --git a/app/views/submissions/_send_email_base.html.erb b/app/views/submissions/_send_email_base.html.erb
index 4e640d70..24d25e73 100644
--- a/app/views/submissions/_send_email_base.html.erb
+++ b/app/views/submissions/_send_email_base.html.erb
@@ -69,7 +69,7 @@
         <%= f.label :message, t('body'), class: 'label' %>
         <% body_variables = AccountConfig::EMAIL_VARIABLES[AccountConfig::SUBMITTER_INVITATION_EMAIL_KEY] %>
         <%= render 'personalization_settings/email_body_editor', name: f.field_name(:body), value: local_assigns[:submitter_email_message]&.normalized_body.presence || (is_edit_viewer ? view_template_body : nil) || submitter_preferences_index.dig(local_assigns[:submitter]&.uuid, 'request_email_body').presence || (is_edit_viewer ? view_config.value['body'] : default_body), variables: body_variables %>
-        <% if !local_assigns.fetch(:disable_save_as_default_template_option, false) && config.value['body_type'] != 'html' %>
+        <% if !local_assigns.fetch(:disable_save_as_default_template_option, false) && config.value['body_type'] != 'html' && template && can?(:update, template) %>
           <label for="<%= uuid = SecureRandom.uuid %>" class="flex items-center cursor-pointer">
             <%= check_box_tag :save_message, id: uuid, class: 'base-checkbox', checked: false %>
             <span class="label"><%= t('save_as_default_template_message') %></span>
diff --git a/config/initializers/hexapdf.rb b/config/initializers/hexapdf.rb
index 2552cdaf..7562ee72 100644
--- a/config/initializers/hexapdf.rb
+++ b/config/initializers/hexapdf.rb
@@ -110,4 +110,65 @@ module HexaPDF
       end
     end
   end
+
+  module CycleSafeInheritedValue
+    def inherited_value(field, name)
+      seen = Set.new.compare_by_identity
+      seen << field.value
+
+      while field.value[name].nil? && (parent = field[:Parent]) && seen.add?(parent.value)
+        field = parent
+      end
+
+      field.value[name].nil? ? nil : field[name]
+    end
+  end
+
+  module CycleSafeEachField
+    def each_field(terminal_only: true)
+      return to_enum(__method__, terminal_only:) unless block_given?
+
+      seen = Set.new.compare_by_identity
+
+      process_field_array = lambda do |array|
+        array.each_with_index do |field, index|
+          next if field.nil?
+
+          unless field.respond_to?(:type) && field.type == :XXAcroFormField
+            array[index] = field = HexaPDF::Type::AcroForm::Field.wrap(document, field)
+          end
+
+          next unless seen.add?(field.value)
+
+          if field.terminal_field?
+            yield(field)
+          else
+            yield(field) unless terminal_only
+
+            process_field_array.call(field[:Kids])
+          end
+        end
+      end
+
+      process_field_array.call(root_fields)
+
+      self
+    end
+  end
+
+  module CycleSafeFullFieldName
+    def full_field_name(seen = Set.new.compare_by_identity)
+      return field_name unless seen.add?(value)
+
+      if key?(:Parent)
+        [self[:Parent].full_field_name(seen), field_name].compact.join('.')
+      else
+        field_name
+      end
+    end
+  end
 end
+
+HexaPDF::Type::AcroForm::Field.singleton_class.prepend(HexaPDF::CycleSafeInheritedValue)
+HexaPDF::Type::AcroForm::Field.prepend(HexaPDF::CycleSafeFullFieldName)
+HexaPDF::Type::AcroForm::Form.prepend(HexaPDF::CycleSafeEachField)
diff --git a/config/locales/i18n.yml b/config/locales/i18n.yml
index 776aea52..a14d53aa 100644
--- a/config/locales/i18n.yml
+++ b/config/locales/i18n.yml
@@ -57,8 +57,11 @@ en: &en
   paypal_account_has_been_connected: PayPal account has been connected.
   re_connect_paypal: Re-connect PayPal
   disconnect: Disconnect
-  failed_to_connect_paypal: Failed to connect PayPal. Please try again.
-  paypal_connect_not_completed: PayPal connection was not completed.
+  failed_to_connect_paypal_please_try_again: Failed to connect PayPal. Please try again.
+  paypal_connection_was_not_completed: PayPal connection was not completed.
+  disconnecting_your_paypal_account_will_prevent_you_from_offering_paypal_services_and_products_on_your_website_do_you_wish_to_continue: Disconnecting your PayPal account will prevent you from offering PayPal services and products on your website. Do you wish to continue?
+  attention_you_currently_cannot_receive_payments_due_to_restriction_on_your_paypal_account_please_reach_out_to_paypal_customer_support_or_connect_to_paypal_com_for_more_information: 'Attention: You currently cannot receive payments due to restriction on your PayPal account. Please reach out to PayPal Customer Support or connect to https://www.paypal.com for more information.'
+  attention_please_confirm_your_email_address_on_paypal_com_in_order_to_receive_payments_you_currently_cannot_receive_payments: 'Attention: Please confirm your email address on https://www.paypal.com/businessprofile/settings in order to receive payments! You currently cannot receive payments.'
   payment_receipt: Payment Receipt
   amount_paid: Amount paid
   transaction: Transaction
@@ -1113,9 +1116,16 @@ en: &en
     submission_submitters: Submitters list
     submission_link: Submission link
     documents_link: Documents link
+  date:
+    formats:
+      default: "%m/%d/%Y"
+      short: "%b %-d"
+      long: "%B %-d, %Y"
   time:
     formats:
-      detailed: "%B %d, %Y %H:%M:%S"
+      short: "%b %-d, %-I:%M %p"
+      long: "%B %-d, %Y at %-I:%M %p"
+      detailed: "%B %-d, %Y at %-I:%M:%S %p"
 
 es: &es
   knowledge_based_authentication: Autenticación basada en el conocimiento
@@ -1147,8 +1157,11 @@ es: &es
   paypal_integration: Integración con PayPal
   paypal_account_has_been_connected: La cuenta de PayPal ha sido conectada.
   re_connect_paypal: Volver a conectar PayPal
-  failed_to_connect_paypal: No se pudo conectar PayPal. Por favor, inténtalo de nuevo.
-  paypal_connect_not_completed: La conexión con PayPal no se completó.
+  failed_to_connect_paypal_please_try_again: No se pudo conectar PayPal. Por favor, inténtalo de nuevo.
+  paypal_connection_was_not_completed: La conexión con PayPal no se completó.
+  disconnecting_your_paypal_account_will_prevent_you_from_offering_paypal_services_and_products_on_your_website_do_you_wish_to_continue: Desconectar tu cuenta de PayPal impedirá que ofrezcas servicios y productos de PayPal en tu sitio web. ¿Deseas continuar?
+  attention_you_currently_cannot_receive_payments_due_to_restriction_on_your_paypal_account_please_reach_out_to_paypal_customer_support_or_connect_to_paypal_com_for_more_information: 'Atención: Actualmente no puedes recibir pagos debido a una restricción en tu cuenta de PayPal. Por favor, contacta con el Soporte al Cliente de PayPal o visita https://www.paypal.com para más información.'
+  attention_please_confirm_your_email_address_on_paypal_com_in_order_to_receive_payments_you_currently_cannot_receive_payments: 'Atención: Por favor, confirma tu dirección de correo electrónico en https://www.paypal.com/businessprofile/settings para poder recibir pagos. Actualmente no puedes recibir pagos.'
   payment_receipt: Recibo de pago
   amount_paid: Importe pagado
   transaction: Transacción
@@ -2210,9 +2223,30 @@ es: &es
     submission_submitters: Lista de firmantes
     submission_link: Enlace del envío
     documents_link: Enlace de los documentos
+  date:
+    abbr_month_names:
+      -
+      - ene
+      - feb
+      - mar
+      - abr
+      - may
+      - jun
+      - jul
+      - ago
+      - sept
+      - oct
+      - nov
+      - dic
+    formats:
+      default: "%d/%m/%Y"
+      short: "%-d %b"
+      long: "%-d de %B de %Y"
   time:
     formats:
-      detailed: "%-d de %B de %Y %H:%M:%S"
+      short: "%-d %b, %-H:%M"
+      long: "%-d de %B de %Y a las %-H:%M"
+      detailed: "%-d de %B de %Y a las %-H:%M:%S"
 
 it: &it
   knowledge_based_authentication: Autenticazione basata sulla conoscenza
@@ -2244,8 +2278,11 @@ it: &it
   paypal_integration: Integrazione PayPal
   paypal_account_has_been_connected: L'account PayPal è stato collegato.
   re_connect_paypal: Ricollega PayPal
-  failed_to_connect_paypal: Impossibile collegare PayPal. Riprova.
-  paypal_connect_not_completed: La connessione con PayPal non è stata completata.
+  failed_to_connect_paypal_please_try_again: Impossibile collegare PayPal. Riprova.
+  paypal_connection_was_not_completed: La connessione con PayPal non è stata completata.
+  disconnecting_your_paypal_account_will_prevent_you_from_offering_paypal_services_and_products_on_your_website_do_you_wish_to_continue: La disconnessione del tuo account PayPal ti impedirà di offrire servizi e prodotti PayPal sul tuo sito web. Vuoi continuare?
+  attention_you_currently_cannot_receive_payments_due_to_restriction_on_your_paypal_account_please_reach_out_to_paypal_customer_support_or_connect_to_paypal_com_for_more_information: 'Attenzione: Al momento non puoi ricevere pagamenti a causa di una restrizione sul tuo account PayPal. Contatta l''Assistenza Clienti PayPal o visita https://www.paypal.com per maggiori informazioni.'
+  attention_please_confirm_your_email_address_on_paypal_com_in_order_to_receive_payments_you_currently_cannot_receive_payments: 'Attenzione: Conferma il tuo indirizzo email su https://www.paypal.com/businessprofile/settings per poter ricevere pagamenti! Al momento non puoi ricevere pagamenti.'
   payment_receipt: Ricevuta di pagamento
   amount_paid: Importo pagato
   transaction: Transazione
@@ -3307,9 +3344,16 @@ it: &it
     submission_submitters: Lista dei firmatari
     submission_link: Link dell'invio
     documents_link: Link dei documenti
+  date:
+    formats:
+      default: "%d/%m/%Y"
+      short: "%-d %b"
+      long: "%-d %B %Y"
   time:
     formats:
-      detailed: "%d %B %Y %H:%M:%S"
+      short: "%-d %b, %H:%M"
+      long: "%-d %B %Y alle ore %H:%M"
+      detailed: "%-d %B %Y alle ore %H:%M:%S"
 
 fr: &fr
   knowledge_based_authentication: Authentification basée sur la connaissance
@@ -3341,8 +3385,11 @@ fr: &fr
   paypal_integration: Intégration PayPal
   paypal_account_has_been_connected: Le compte PayPal a été connecté.
   re_connect_paypal: Reconnecter PayPal
-  failed_to_connect_paypal: Échec de la connexion à PayPal. Veuillez réessayer.
-  paypal_connect_not_completed: La connexion à PayPal n'a pas été complétée.
+  failed_to_connect_paypal_please_try_again: Échec de la connexion à PayPal. Veuillez réessayer.
+  paypal_connection_was_not_completed: La connexion à PayPal n'a pas été complétée.
+  disconnecting_your_paypal_account_will_prevent_you_from_offering_paypal_services_and_products_on_your_website_do_you_wish_to_continue: Déconnecter votre compte PayPal vous empêchera de proposer des services et produits PayPal sur votre site web. Voulez-vous continuer ?
+  attention_you_currently_cannot_receive_payments_due_to_restriction_on_your_paypal_account_please_reach_out_to_paypal_customer_support_or_connect_to_paypal_com_for_more_information: 'Attention : Vous ne pouvez actuellement pas recevoir de paiements en raison d''une restriction sur votre compte PayPal. Veuillez contacter le service client PayPal ou visiter https://www.paypal.com pour plus d''informations.'
+  attention_please_confirm_your_email_address_on_paypal_com_in_order_to_receive_payments_you_currently_cannot_receive_payments: 'Attention : Veuillez confirmer votre adresse e-mail sur https://www.paypal.com/businessprofile/settings afin de pouvoir recevoir des paiements ! Vous ne pouvez actuellement pas recevoir de paiements.'
   payment_receipt: Reçu de paiement
   amount_paid: Montant payé
   transaction: Transaction
@@ -4401,9 +4448,29 @@ fr: &fr
     submission_submitters: Liste des signataires
     submission_link: Lien de la soumission
     documents_link: Lien des documents
+  date:
+    abbr_month_names:
+      -
+      - janv.
+      - févr.
+      - mars
+      - avr.
+      - mai
+      - juin
+      - juil.
+      - août
+      - sept.
+      - oct.
+      - nov.
+      - déc.
+    formats:
+      short: "%-d %b"
+      long: "%-d %B %Y"
   time:
     formats:
-      detailed: "%A %d %B %Y %Hh%Mm%Ss"
+      short: "%-d %b, %H:%M"
+      long: "%-d %B %Y à %H:%M"
+      detailed: "%-d %B %Y à %H:%M:%S"
 
 pt: &pt
   knowledge_based_authentication: Autenticação baseada em conhecimento
@@ -4435,8 +4502,11 @@ pt: &pt
   paypal_integration: Integração com PayPal
   paypal_account_has_been_connected: Conta PayPal foi conectada.
   re_connect_paypal: Reconectar PayPal
-  failed_to_connect_paypal: Falha ao conectar PayPal. Tente novamente.
-  paypal_connect_not_completed: A conexão com PayPal não foi concluída.
+  failed_to_connect_paypal_please_try_again: Falha ao conectar PayPal. Tente novamente.
+  paypal_connection_was_not_completed: A conexão com PayPal não foi concluída.
+  disconnecting_your_paypal_account_will_prevent_you_from_offering_paypal_services_and_products_on_your_website_do_you_wish_to_continue: Desconectar sua conta PayPal impedirá que você ofereça serviços e produtos PayPal no seu site. Deseja continuar?
+  attention_you_currently_cannot_receive_payments_due_to_restriction_on_your_paypal_account_please_reach_out_to_paypal_customer_support_or_connect_to_paypal_com_for_more_information: 'Atenção: No momento você não pode receber pagamentos devido a uma restrição na sua conta PayPal. Entre em contato com o Suporte ao Cliente PayPal ou acesse https://www.paypal.com para mais informações.'
+  attention_please_confirm_your_email_address_on_paypal_com_in_order_to_receive_payments_you_currently_cannot_receive_payments: 'Atenção: Por favor, confirme seu endereço de e-mail em https://www.paypal.com/businessprofile/settings para poder receber pagamentos! No momento você não pode receber pagamentos.'
   payment_receipt: Recibo de pagamento
   amount_paid: Valor pago
   transaction: Transação
@@ -5498,9 +5568,29 @@ pt: &pt
     submission_submitters: Lista de signatários
     submission_link: Link da submissão
     documents_link: Link dos documentos
+  date:
+    abbr_month_names:
+      -
+      - jan.
+      - fev.
+      - mar.
+      - abr.
+      - mai.
+      - jun.
+      - jul.
+      - ago.
+      - set.
+      - out.
+      - nov.
+      - dez.
+    formats:
+      short: "%-d de %b"
+      long: "%-d de %B de %Y"
   time:
     formats:
-      detailed: "%A, %d de %B de %Y, %H:%M:%Sh"
+      short: "%-d de %b, %H:%M"
+      long: "%-d de %B de %Y às %H:%M"
+      detailed: "%-d de %B de %Y às %H:%M:%S"
 
 de: &de
   knowledge_based_authentication: Wissensbasierte Authentifizierung
@@ -5542,8 +5632,11 @@ de: &de
   paypal_integration: PayPal-Integration
   paypal_account_has_been_connected: PayPal-Konto wurde verbunden.
   re_connect_paypal: PayPal erneut verbinden
-  failed_to_connect_paypal: PayPal konnte nicht verbunden werden. Bitte erneut versuchen.
-  paypal_connect_not_completed: Die PayPal-Verbindung wurde nicht abgeschlossen.
+  failed_to_connect_paypal_please_try_again: PayPal konnte nicht verbunden werden. Bitte erneut versuchen.
+  paypal_connection_was_not_completed: Die PayPal-Verbindung wurde nicht abgeschlossen.
+  disconnecting_your_paypal_account_will_prevent_you_from_offering_paypal_services_and_products_on_your_website_do_you_wish_to_continue: Das Trennen Ihres PayPal-Kontos verhindert, dass Sie PayPal-Dienste und -Produkte auf Ihrer Website anbieten können. Möchten Sie fortfahren?
+  attention_you_currently_cannot_receive_payments_due_to_restriction_on_your_paypal_account_please_reach_out_to_paypal_customer_support_or_connect_to_paypal_com_for_more_information: 'Achtung: Sie können derzeit aufgrund einer Einschränkung Ihres PayPal-Kontos keine Zahlungen empfangen. Bitte wenden Sie sich an den PayPal-Kundenservice oder besuchen Sie https://www.paypal.com für weitere Informationen.'
+  attention_please_confirm_your_email_address_on_paypal_com_in_order_to_receive_payments_you_currently_cannot_receive_payments: 'Achtung: Bitte bestätigen Sie Ihre E-Mail-Adresse auf https://www.paypal.com/businessprofile/settings, um Zahlungen empfangen zu können! Sie können derzeit keine Zahlungen empfangen.'
   payment_receipt: Zahlungsbeleg
   amount_paid: Gezahlter Betrag
   transaction: Transaktion
@@ -6595,11 +6688,42 @@ de: &de
     submission_submitters: Liste der Unterzeichner
     submission_link: Link der Einreichung
     documents_link: Link der Dokumente
+  date:
+    abbr_month_names:
+      -
+      - Jan.
+      - Feb.
+      - März
+      - Apr.
+      - Mai
+      - Juni
+      - Juli
+      - Aug.
+      - Sept.
+      - Okt.
+      - Nov.
+      - Dez.
+    formats:
+      default: "%d.%m.%Y"
+      short: "%-d. %b"
+      long: "%-d. %B %Y"
   time:
     formats:
-      detailed: "%A, %d. %B %Y, %H:%M:%S Uhr"
+      short: "%-d. %b, %H:%M"
+      long: "%-d. %B %Y um %H:%M"
+      detailed: "%-d. %B %Y um %H:%M:%S"
 
 pl:
+  date:
+    formats:
+      default: "%d.%m.%Y"
+      short: "%-d %b"
+      long: "%-d %B %Y"
+  time:
+    formats:
+      short: "%-d %b, %H:%M"
+      long: "%-d %B %Y %H:%M"
+      detailed: "%-d %B %Y %H:%M:%S"
   require_phone_2fa_to_open: Wymagaj uwierzytelniania telefonicznego 2FA do otwarcia
   the_sender_has_requested_a_two_factor_authentication_via_one_time_password_sent_to_your_html: Nadawca zażądał uwierzytelnienia dwuskładnikowego poprzez jednorazowe hasło wysłane na Twój numer telefonu <b>%{phone}</b>.
   send_verification_code: Wyślij kod weryfikacyjny
@@ -6701,6 +6825,44 @@ pl:
   too_many_requests_try_again_later: Zbyt wiele żądań. Spróbuj ponownie później.
 
 uk:
+  date:
+    month_names:
+      -
+      - січня
+      - лютого
+      - березня
+      - квітня
+      - травня
+      - червня
+      - липня
+      - серпня
+      - вересня
+      - жовтня
+      - листопада
+      - грудня
+    abbr_month_names:
+      -
+      - січ.
+      - лют.
+      - бер.
+      - квіт.
+      - трав.
+      - черв.
+      - лип.
+      - серп.
+      - вер.
+      - жовт.
+      - лист.
+      - груд.
+    formats:
+      default: "%d.%m.%Y"
+      short: "%-d %b"
+      long: "%-d %B %Y р."
+  time:
+    formats:
+      short: "%-d %b, %H:%M"
+      long: "%-d %B %Y р. о %H:%M"
+      detailed: "%-d %B %Y р. о %H:%M:%S"
   require_phone_2fa_to_open: Вимагати двофакторну автентифікацію через телефон для відкриття
   the_sender_has_requested_a_two_factor_authentication_via_one_time_password_sent_to_your_html: Відправник запитав двофакторну автентифікацію за допомогою одноразового пароля, надісланого на ваш номер телефону <b>%{phone}</b>.
   send_verification_code: Надіслати код перевірки
@@ -6802,6 +6964,44 @@ uk:
   too_many_requests_try_again_later: Забагато запитів. Спробуйте пізніше.
 
 cs:
+  date:
+    month_names:
+      -
+      - ledna
+      - února
+      - března
+      - dubna
+      - května
+      - června
+      - července
+      - srpna
+      - září
+      - října
+      - listopadu
+      - prosince
+    abbr_month_names:
+      -
+      - led
+      - úno
+      - bře
+      - dub
+      - kvě
+      - čvn
+      - čvc
+      - srp
+      - zář
+      - říj
+      - lis
+      - pro
+    formats:
+      default: "%d. %m. %Y"
+      short: "%-d. %-m."
+      long: "%-d. %B %Y"
+  time:
+    formats:
+      short: "%-d. %-m. %-H:%M"
+      long: "%-d. %B %Y v %-H:%M"
+      detailed: "%-d. %B %Y v %-H:%M:%S"
   require_phone_2fa_to_open: Vyžadovat otevření pomocí telefonního 2FA
   the_sender_has_requested_a_two_factor_authentication_via_one_time_password_sent_to_your_html: Odesílatel požádal o dvoufaktorové ověření pomocí jednorázového hesla zaslaného na vaše telefonní číslo <b>%{phone}</b>.
   send_verification_code: Odeslat ověřovací kód
@@ -6903,6 +7103,30 @@ cs:
   too_many_requests_try_again_later: Příliš mnoho požadavků. Zkuste to později.
 
 he:
+  date:
+    abbr_month_names:
+      -
+      - ינו׳
+      - פבר׳
+      - מרץ
+      - אפר׳
+      - מאי
+      - יוני
+      - יולי
+      - אוג׳
+      - ספט׳
+      - אוק׳
+      - נוב׳
+      - דצמ׳
+    formats:
+      default: "%d.%m.%Y"
+      short: "%-d ב%b"
+      long: "%-d ב%B %Y"
+  time:
+    formats:
+      short: "%-d ב%b, %-H:%M"
+      long: "%-d ב%B %Y בשעה %-H:%M"
+      detailed: "%-d ב%B %Y בשעה %-H:%M:%S"
   require_phone_2fa_to_open: דרוש אימות דו-שלבי באמצעות טלפון לפתיחה
   the_sender_has_requested_a_two_factor_authentication_via_one_time_password_sent_to_your_html: השולח ביקש אימות דו-שלבי באמצעות סיסמה חד פעמית שנשלחה למספר הטלפון שלך <b>%{phone}</b>.
   send_verification_code: שלח קוד אימות
@@ -7043,8 +7267,11 @@ nl: &nl
   paypal_integration: PayPal-integratie
   paypal_account_has_been_connected: PayPal-account is verbonden.
   re_connect_paypal: PayPal opnieuw verbinden
-  failed_to_connect_paypal: PayPal kon niet worden verbonden. Probeer het opnieuw.
-  paypal_connect_not_completed: De verbinding met PayPal is niet voltooid.
+  failed_to_connect_paypal_please_try_again: PayPal kon niet worden verbonden. Probeer het opnieuw.
+  paypal_connection_was_not_completed: De verbinding met PayPal is niet voltooid.
+  disconnecting_your_paypal_account_will_prevent_you_from_offering_paypal_services_and_products_on_your_website_do_you_wish_to_continue: Het loskoppelen van uw PayPal-account voorkomt dat u PayPal-diensten en -producten op uw website kunt aanbieden. Wilt u doorgaan?
+  attention_you_currently_cannot_receive_payments_due_to_restriction_on_your_paypal_account_please_reach_out_to_paypal_customer_support_or_connect_to_paypal_com_for_more_information: 'Let op: U kunt momenteel geen betalingen ontvangen vanwege een beperking op uw PayPal-account. Neem contact op met de PayPal-klantenservice of ga naar https://www.paypal.com voor meer informatie.'
+  attention_please_confirm_your_email_address_on_paypal_com_in_order_to_receive_payments_you_currently_cannot_receive_payments: 'Let op: Bevestig uw e-mailadres op https://www.paypal.com/businessprofile/settings om betalingen te kunnen ontvangen! U kunt momenteel geen betalingen ontvangen.'
   payment_receipt: Betalingsbewijs
   amount_paid: Betaald bedrag
   transaction: Transactie
@@ -8093,11 +8320,29 @@ nl: &nl
     submission_submitters: Lijst van ondertekenaars
     submission_link: Link van de inzending
     documents_link: Link van de documenten
+  date:
+    formats:
+      short: "%-d %b"
+      long: "%-d %B %Y"
   time:
     formats:
-      detailed: "%d %B %Y %H:%M:%S"
+      short: "%-d %b, %H:%M"
+      long: "%-d %B %Y om %H:%M"
+      detailed: "%-d %B %Y om %H:%M:%S"
 
 ar:
+  date:
+    formats:
+      default: "%d‏/%m‏/%Y"
+      short: "%-d %b"
+      long: "%-d %B %Y"
+  time:
+    am: "ص"
+    pm: "م"
+    formats:
+      short: "%-d %b، %-I:%M %p"
+      long: "%-d %B %Y في %-I:%M %p"
+      detailed: "%-d %B %Y في %-I:%M:%S %p"
   require_phone_2fa_to_open: "يتطلب المصادقة الثنائية عبر الهاتف للفتح"
   the_sender_has_requested_a_two_factor_authentication_via_one_time_password_sent_to_your_html: "طلب المرسل المصادقة الثنائية عبر كلمة مرور لمرة واحدة مرسلة إلى رقم هاتفك <b>%{phone}</b>."
   send_verification_code: "إرسال رمز التحقق"
@@ -8199,6 +8444,16 @@ ar:
   too_many_requests_try_again_later: طلبات كثيرة جدًا. حاول مرة أخرى لاحقًا.
 
 ko:
+  date:
+    formats:
+      default: "%Y. %m. %d."
+      short: "%b %-d일"
+      long: "%Y년 %B %-d일"
+  time:
+    formats:
+      short: "%b %-d일 %p %-I:%M"
+      long: "%Y년 %B %-d일 %p %-I:%M"
+      detailed: "%Y년 %B %-d일 %p %-I:%M:%S"
   require_phone_2fa_to_open: 열려면 휴대폰 2FA 요구
   the_sender_has_requested_a_two_factor_authentication_via_one_time_password_sent_to_your_html: 발신자가 <b>%{phone}</b> 전화번호로 전송된 일회용 비밀번호를 통해 2단계 인증을 요청했습니다.
   send_verification_code: 인증 코드 보내기
@@ -8300,6 +8555,16 @@ ko:
   too_many_requests_try_again_later: 요청이 너무 많습니다. 나중에 다시 시도하세요.
 
 ja:
+  date:
+    formats:
+      default: "%Y/%m/%d"
+      short: "%-m月%-d日"
+      long: "%Y年%-m月%-d日"
+  time:
+    formats:
+      short: "%-m月%-d日 %-H:%M"
+      long: "%Y年%-m月%-d日 %-H:%M"
+      detailed: "%Y年%-m月%-d日 %-H:%M:%S"
   require_phone_2fa_to_open: 電話による2段階認証が必要です
   the_sender_has_requested_a_two_factor_authentication_via_one_time_password_sent_to_your_html: 送信者は、<b>%{phone}</b> に送信されたワンタイムパスワードによる2段階認証を要求しました。
   send_verification_code: 認証コードを送信
@@ -8402,21 +8667,33 @@ ja:
 
 en-US:
   <<: *en
-  date:
-    formats:
-      default: "%m/%d/%Y"
-  time:
-    formats:
-      detailed: "%B %d, %Y %I:%M:%S %p"
 
 en-GB:
   <<: *en
   date:
+    abbr_month_names:
+      -
+      - Jan
+      - Feb
+      - Mar
+      - Apr
+      - May
+      - Jun
+      - Jul
+      - Aug
+      - Sept
+      - Oct
+      - Nov
+      - Dec
     formats:
       default: "%d/%m/%Y"
+      short: "%-d %b"
+      long: "%-d %B %Y"
   time:
     formats:
-      detailed: "%d %B, %Y %H:%M:%S"
+      short: "%-d %b, %H:%M"
+      long: "%-d %B %Y at %H:%M"
+      detailed: "%-d %B %Y at %H:%M:%S"
 
 es-ES:
   <<: *es
diff --git a/db/migrate/20250915060548_create_lock_events.rb b/db/migrate/20250915060548_create_lock_events.rb
index eb1a5597..0ff49ddd 100644
--- a/db/migrate/20250915060548_create_lock_events.rb
+++ b/db/migrate/20250915060548_create_lock_events.rb
@@ -6,7 +6,8 @@ class CreateLockEvents < ActiveRecord::Migration[8.0]
       t.string :key, index: true, null: false
       t.string :event_name, null: false
 
-      t.index %i[event_name key], unique: adapter_name != 'Mysql2', where: "event_name IN ('start', 'complete')"
+      t.index %i[event_name key], unique: connection.supports_partial_index?,
+                                  where: "event_name IN ('start', 'complete')"
 
       t.timestamps
     end
diff --git a/db/migrate/20251121092044_add_is_first_to_completed_submitters.rb b/db/migrate/20251121092044_add_is_first_to_completed_submitters.rb
index 1b3adf0f..56869043 100644
--- a/db/migrate/20251121092044_add_is_first_to_completed_submitters.rb
+++ b/db/migrate/20251121092044_add_is_first_to_completed_submitters.rb
@@ -10,7 +10,7 @@ class AddIsFirstToCompletedSubmitters < ActiveRecord::Migration[8.0]
               where: 'is_first = TRUE',
               name: 'index_completed_submitters_account_id_completed_at_is_first'
 
-    add_index :completed_submitters, :submission_id, unique: adapter_name != 'Mysql2',
+    add_index :completed_submitters, :submission_id, unique: connection.supports_partial_index?,
                                                      where: 'is_first = TRUE'
   end
 end
diff --git a/lib/pdfium.rb b/lib/pdfium.rb
index 06d22475..e7c5ec40 100644
--- a/lib/pdfium.rb
+++ b/lib/pdfium.rb
@@ -98,6 +98,7 @@ class Pdfium
 
   attach_function :FPDF_LoadDocument, %i[string FPDF_STRING], :FPDF_DOCUMENT
   attach_function :FPDF_LoadMemDocument, %i[pointer int FPDF_STRING], :FPDF_DOCUMENT
+  attach_function :FPDF_LoadCustomDocument, %i[pointer FPDF_STRING], :FPDF_DOCUMENT
   attach_function :FPDF_CloseDocument, [:FPDF_DOCUMENT], :void
   attach_function :FPDF_GetPageCount, [:FPDF_DOCUMENT], :int
   attach_function :FPDF_GetLastError, [], :ulong
@@ -463,6 +464,43 @@ class Pdfium
       end
     end
 
+    def self.open_io(io, password = nil)
+      io.binmode
+
+      get_block = FFI::Function.new(:int, %i[pointer ulong pointer ulong]) do |_param, position, out, size|
+        io.seek(position)
+
+        bytes = io.read(size).to_s
+
+        out.put_bytes(0, bytes)
+
+        bytes.bytesize == size ? 1 : 0
+      end
+
+      file_access = Pdfium::FPDF_FILEACCESS.new
+      file_access[:m_FileLen] = io.size
+      file_access[:m_GetBlock] = get_block
+      file_access[:m_Param] = FFI::Pointer::NULL
+
+      doc_ptr = Pdfium.FPDF_LoadCustomDocument(file_access, password)
+
+      if doc_ptr.null?
+        Pdfium.check_last_error('Failed to load document from IO')
+
+        raise PdfiumError, 'Failed to load document from IO, pointer is NULL.'
+      end
+
+      doc = new(doc_ptr, [file_access, get_block, io])
+
+      return doc unless block_given?
+
+      begin
+        yield doc
+      ensure
+        doc.close
+      end
+    end
+
     def closed?
       @closed
     end
diff --git a/lib/submitters.rb b/lib/submitters.rb
index 09852001..979ba6bc 100644
--- a/lib/submitters.rb
+++ b/lib/submitters.rb
@@ -93,7 +93,8 @@ module Submitters
   def plain_search(submitters, keyword)
     return submitters if keyword.blank?
 
-    term = "%#{keyword.downcase}%"
+    sanitized = ActiveRecord::Base.sanitize_sql_like(keyword.downcase)
+    term = "%#{sanitized}%"
 
     arel_table = Submitter.arel_table
 
diff --git a/lib/submitters/submit_values.rb b/lib/submitters/submit_values.rb
index 5484f238..6c83a1ef 100644
--- a/lib/submitters/submit_values.rb
+++ b/lib/submitters/submit_values.rb
@@ -114,7 +114,7 @@ module Submitters
       end
 
       reason_field = submitter.submission.template_fields.find do |e|
-        e['uuid'] == reason_field_uuid && e['submitter_uuid'] == submitter.uuid
+        e['uuid'] == reason_field_uuid
       end
 
       if reason_field
diff --git a/lib/templates/find_acro_fields.rb b/lib/templates/find_acro_fields.rb
index 7940145a..16d52add 100644
--- a/lib/templates/find_acro_fields.rb
+++ b/lib/templates/find_acro_fields.rb
@@ -251,7 +251,9 @@ module Templates
             fields_index[annot.hash] ||= HexaPDF::Type::AcroForm::Field.wrap(pdf, annot)
           elsif annot.key?(:Parent)
             field = annot[:Parent]
-            field = field[:Parent] while field[:Parent]
+            seen = Set.new.compare_by_identity
+
+            field = field[:Parent] while field[:Parent] && seen.add?(field.value)
 
             annots_index[field.hash] ||= page
             fields_index[field.hash] ||= HexaPDF::Type::AcroForm::Field.wrap(pdf, field)
@@ -262,7 +264,7 @@ module Templates
       [process_fields_array(pdf, fields_index.values), annots_index]
     end
 
-    def process_fields_array(pdf, array, acc = [])
+    def process_fields_array(pdf, array, acc = [], seen = Set.new.compare_by_identity)
       array.each_with_index do |field, index|
         next if field.nil?
 
@@ -270,10 +272,12 @@ module Templates
           array[index] = field = HexaPDF::Type::AcroForm::Field.wrap(pdf, field)
         end
 
+        next unless seen.add?(field.value)
+
         if field.terminal_field?
           acc << field
         else
-          process_fields_array(pdf, field[:Kids], acc)
+          process_fields_array(pdf, field[:Kids], acc, seen)
         end
       end
 
diff --git a/lib/templates/process_document.rb b/lib/templates/process_document.rb
index 9db405f6..4e69a4c1 100644
--- a/lib/templates/process_document.rb
+++ b/lib/templates/process_document.rb
@@ -192,8 +192,8 @@ module Templates
       end
     end
 
-    def generate_pdf_preview_from_file(attachment, file_path, page_number)
-      doc = Pdfium::Document.open_file(file_path)
+    def generate_pdf_preview_from_io(attachment, io, page_number)
+      doc = Pdfium::Document.open_io(io)
 
       doc_page = doc.get_page(page_number)