diff --git a/lib/pdf_processor.rb b/lib/pdf_processor.rb
index 79716929..27257eea 100644
--- a/lib/pdf_processor.rb
+++ b/lib/pdf_processor.rb
@@ -40,7 +40,7 @@ class PdfProcessor < HexaPDF::Content::Processor
 
     new_io = StringIO.new
 
-    doc.write(new_io)
+    doc.write(new_io, validate: false)
 
     [new_io.tap(&:rewind).read, acc]
   end
diff --git a/lib/submissions/generate_result_attachments.rb b/lib/submissions/generate_result_attachments.rb
index 8dd14198..040c779c 100644
--- a/lib/submissions/generate_result_attachments.rb
+++ b/lib/submissions/generate_result_attachments.rb
@@ -250,9 +250,9 @@ module Submissions
           sign_params[:signature_size] = 10_000
         end
 
-        pdf.sign(io, **sign_params)
+        pdf.sign(io, write_options: { validate: false }, **sign_params)
       else
-        pdf.write(io, incremental: true)
+        pdf.write(io, incremental: true, validate: false)
       end
 
       ActiveStorage::Attachment.create!(