decline submission

spec/mailers/previews/submitter_mailer_preview.rb

@@ -11,6 +11,12 @@ class SubmitterMailerPreview < ActionMailer::Preview
     SubmitterMailer.completed_email(submitter, User.last)
   end
 
+  def declined_email
+    submitter = Submitter.where.not(declined_at: nil).last
+
+    SubmitterMailer.declined_email(submitter, User.last)
+  end
+
   def documents_copy_email
     submitter = Submitter.where.not(completed_at: nil).joins(:documents_attachments).last