diff --git a/composite-envelope-builder/force-app/main/default/classes/DocusignCompositeEnvelopeBuilder.cls b/composite-envelope-builder/force-app/main/default/classes/DocusignCompositeEnvelopeBuilder.cls
index abd3df0..1595ee8 100644
--- a/composite-envelope-builder/force-app/main/default/classes/DocusignCompositeEnvelopeBuilder.cls
+++ b/composite-envelope-builder/force-app/main/default/classes/DocusignCompositeEnvelopeBuilder.cls
@@ -225,7 +225,8 @@ global with sharing class DocusignCompositeEnvelopeBuilder {
                     bodyIdsAdded.add(templateId);
                 }
             }
-            String envelopeSubject = combinedName;
+            // Prefix the envelope subject so recipients see the source immediately
+            String envelopeSubject = 'Docusign: ' + combinedName;
             // Truncate subject to 100 characters maximum as required by Docusign
             if (envelopeSubject.length() > 100) {
                 envelopeSubject = envelopeSubject.left(97) + '...';