diff --git a/lib/email_messages.rb b/lib/email_messages.rb
index 49e9de12..aeede647 100644
--- a/lib/email_messages.rb
+++ b/lib/email_messages.rb
@@ -4,7 +4,7 @@ module EmailMessages
   module_function
 
   def find_or_create_for_account_user(account, user, subject, body)
-    subject = SubmitterMailer::DEFAULT_INVITATION_SUBJECT if subject.blank?
+    subject = I18n.t(:you_are_invited_to_sign_a_document) if subject.blank?
 
     sha1 = Digest::SHA1.hexdigest({ subject:, body: }.to_json)