What do I do if I receive a postcard without or with the wrong Postcard ID?
If the postcard you just received is missing its Postcard ID (or it seems to be incorrect), please submit a Unknown ID request (the link is also on the right column of the register a postcardpage).
Fill in as much information as possible even if you are not sure. Sometimes if there is very little information, a description of the postcard can help. Note that the postal cancellation mark often displays the date and postal code/city. The Postcrossing team will try to find it for you using the information you provide, so the more details you submit, the more likely it will be found.
You only need to fill out the Unknown ID request once for each postcard. If you make a mistake, delete the request and enter a new one. It can take several days for a match to be found. Please be patient.
Additionally, if you find the Postcard ID and register the postcard before you receive a response, please delete the request. You can delete any request by using the delete button for the request on your "Received postcards" list.
Also, please consider the following:
Are you really certain the Postcard ID is not written somewhere in the postcard? Check for any numbers (even if without the country two letter prefix), or in places like right above/under your own address.
Make sure that the postcard is an official Postcrossing postcard and not a thank you postcard or a private swap.
You can try to enter the correct Postcard ID many times without consequence. So, why not try a different combination? For instance, sometimes 1*s can look like 7*s, 3*s and 5*s can look like 8*s, etc. Don*t worry, the Postcrossing system will not let you register a postcard that does not belong to you.
If the postcard has information about the sender, you can use those hints to search for the user in our search users page and then contact him/her by private message.
Note that postcards with Postcard IDs over one year old cannot be registered. Postcrossing does not keep track of which member was assigned a specific Postcard ID so submitting an Unknown ID request is not helpful.
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