diff --git a/src/Handler/Admin/Test.hs b/src/Handler/Admin/Test.hs
index ff3904e6e..3d6fd5b4a 100644
--- a/src/Handler/Admin/Test.hs
+++ b/src/Handler/Admin/Test.hs
@@ -215,12 +215,29 @@ postAdminTestR = do
                                 Button-Modal
                      |]
 
+      mkCryptoFilnameUser :: UserId -> Handler CryptoFileNameUser
+      mkCryptoFilnameUser = encrypt
+      mkCryptoUUIDUser :: UserId -> Handler CryptoUUIDUser
+      mkCryptoUUIDUser = encrypt
+  usrCryptoFileName <- maybeM (return "no-user_id") (fmap toPathPiece . mkCryptoFilnameUser) maybeAuthId
+  usrCryptoUUID     <- maybeM (return "no-user_id") (fmap toPathPiece . mkCryptoUUIDUser)    maybeAuthId
+
   let locallyDefinedPageHeading = [whamlet|Admin TestPage for Uni2work|]
   siteLayout locallyDefinedPageHeading $ do
   -- defaultLayout $ do
-    setTitle "Uni2work Admin Testpage"
+    setTitle "Uni2work Admin Testpage"    
+
     $(i18nWidgetFile "admin-test")
 
+    [whamlet|
+      <h2>User CryptoId and CryptoFileName
+      <dl>
+        <dt>CryptoUUIDUser
+        <dd>#{usrCryptoUUID}
+        <dt>CryptoFileNameUser
+        <dd>#{usrCryptoFileName}
+    |]
+
     [whamlet|<h2>Formular Demonstration|]
     wrapForm formWidget FormSettings
       { formMethod   = POST
diff --git a/src/Handler/PrintCenter.hs b/src/Handler/PrintCenter.hs
index 41fa484d3..f12f5b9af 100644
--- a/src/Handler/PrintCenter.hs
+++ b/src/Handler/PrintCenter.hs
@@ -91,10 +91,11 @@ lrqf2letter LRQF{..}
   | lrqfLetter == "e" || lrqfLetter == "E" = do 
     rcvr    <- mapM getUser lrqfSuper
     usr     <-      getUser lrqfUser
+    usrShrt <- encrypt $ entityKey usr
     usrUuid <- encrypt $ entityKey usr
     urender <- liftHandler getUrlRender
     let letter = LetterExpireQualificationF 
-          { leqfHolderUUID  = usrUuid
+          { leqfHolderCFN   = usrShrt
           , leqfHolderID    = usr ^. _entityKey
           , leqfHolderDN    = usr ^. _userDisplayName
           , leqfHolderSN    = usr ^. _userSurname
diff --git a/src/Jobs/Handler/SendNotification/Qualification.hs b/src/Jobs/Handler/SendNotification/Qualification.hs
index 6c438ded8..241af0bc3 100644
--- a/src/Jobs/Handler/SendNotification/Qualification.hs
+++ b/src/Jobs/Handler/SendNotification/Qualification.hs
@@ -45,6 +45,7 @@ dispatchNotificationQualificationExpiry nQualification dExpiry jRecipient = user
 dispatchNotificationQualificationExpired :: QualificationId -> UserId -> Handler ()
 dispatchNotificationQualificationExpired nQualification jRecipient = do
   encRecipient :: CryptoUUIDUser <- encrypt jRecipient
+  encRecShort <- encrypt jRecipient
   dbRes <- runDB $ (,,)
     <$> get jRecipient
     <*> get nQualification
@@ -57,7 +58,7 @@ dispatchNotificationQualificationExpired nQualification jRecipient = do
           qname   = CI.original qualificationName
           qshort  = CI.original qualificationShorthand
           letter  = LetterExpireQualificationF 
-            { leqfHolderUUID = encRecipient
+            { leqfHolderCFN  = encRecShort
             , leqfHolderID   = jRecipient
             , leqfHolderDN   = userDisplayName
             , leqfHolderSN   = userSurname
diff --git a/src/Utils/Print/ExpireQualification.hs b/src/Utils/Print/ExpireQualification.hs
index a07f50c7e..1d73a3c6a 100644
--- a/src/Utils/Print/ExpireQualification.hs
+++ b/src/Utils/Print/ExpireQualification.hs
@@ -20,7 +20,7 @@ import Handler.Utils.Widgets (nameHtml) -- , nameHtml')
 
 
 data LetterExpireQualificationF = LetterExpireQualificationF
-    { leqfHolderUUID:: CryptoUUIDUser
+    { leqfHolderCFN :: CryptoFileNameUser
     , leqfHolderID  :: UserId
     , leqfHolderDN  :: UserDisplayName
     , leqfHolderSN  :: UserSurname
@@ -78,7 +78,7 @@ instance MDLetter LetterExpireQualificationF where
   getPJId LetterExpireQualificationF{..} =
     PrintJobIdentification
       { pjiName             = "Expiry"
-      , pjiApcAcknowledge   = "exp-" <> tshow (ciphertext leqfHolderUUID)
+      , pjiApcAcknowledge   = "ex-" <> toPathPiece leqfHolderCFN
       , pjiRecipient        = Nothing       -- to be filled later
       , pjiSender           = Nothing
       , pjiCourse           = Nothing
diff --git a/src/Utils/Print/Letters.hs b/src/Utils/Print/Letters.hs
index d3cd2ccb4..7fe8b4a68 100644
--- a/src/Utils/Print/Letters.hs
+++ b/src/Utils/Print/Letters.hs
@@ -182,7 +182,7 @@ mkApcIdent uuid envelope lk tnow apcAck = Text.filter apcAcceptedChars $ Text.in
       [ ensureLength 38 $ tshow (ciphertext uuid) <> Text.cons '-' (Text.singleton envelope)
       , ensureLength  5 $ paperKind lk
       , ensureLength  9   tnow
-      , apcAck -- length of last part may be arbitrary, thus far was always 12
+      , Text.take    32   apcAck -- length of last part may be arbitrary, but more than 32 symbols do not fit into the line
       ]
   where 
     ensureLength :: Int -> Text -> Text