diff --git a/EnvelopeGenerator.Domain/Constants/SenderAppType.cs b/EnvelopeGenerator.Domain/Constants/SenderAppType.cs
new file mode 100644
index 00000000..f9116cc6
--- /dev/null
+++ b/EnvelopeGenerator.Domain/Constants/SenderAppType.cs
@@ -0,0 +1,8 @@
+namespace EnvelopeGenerator.Domain.Constants
+{
+    public enum SenderAppType
+    {
+        LegacyFormApp = 0,
+        ReceiverUIBlazorApp = 1
+    }
+}
\ No newline at end of file