Kontrollkarte für den Auslandsbriefverkehr

[Rik.S]

Goodmorning guys,

Sorry, but again I'm in need of some help.
Last week I bought this Kontrollkarte für Auslandsbriefverkehr to add to my feldpost and paper items collection. I've been trying to find more info about it and what exactly it was used for, but I can't seem to find it.
Could someone help me and tell me what it was used for? Your help is greatly appreciated as always.

P.S. The IMO nice stamp on it made me buy the Kontrollkarte.

Regards , Rik

[HPL2008]

The document's name roughly translates as "control card for foreign correspondence".

The text on the reverse side teils us that the card was to be presented together with an official identity card when posting letters. It could not be replaced in case of loss; a new card would only be issued if the previous card was submitted.

Clearly it was used to record all foreign correspondence by people in Germany (not just German citizens, as the text on the reverse side is multi-lingual) for security reasons.

[Rik.S]

Thank you for your reply, I have some more understanding about the card now. And the Dutch text on the reverse I could read, but it still wasn't clear to me. So that's why I asked.