diff --git a/ClipboardReaderService.py b/ClipboardReaderService.py
index 4313bd5..d4fea2d 100644
--- a/ClipboardReaderService.py
+++ b/ClipboardReaderService.py
@@ -8,6 +8,8 @@ from smartcard.util import toHexString
 
 from card_reader import read_card
 
+CLIPBOARD_MESSAGE_PREFIX = "ezgglan-clipboard-message:"
+
 
 class ClipboardReaderService:
     def __init__(self) -> None:
@@ -44,9 +46,9 @@ class ClipboardReaderService:
                     user_id = read_card(connection)
 
                     if user_id is not None:
-                        pyperclip.copy(str(user_id))
+                        pyperclip.copy(CLIPBOARD_MESSAGE_PREFIX + str(user_id))
                     else:
-                        pyperclip.copy("Fehler: Erneut scannen")
+                        pyperclip.copy(CLIPBOARD_MESSAGE_PREFIX + "Fehler: Erneut scannen")
 
                 except CardConnectionException:
                     pass