Where should you write the Postcard ID?
For a postcard you sent to be registered, the receiver must be able to read the Postcard ID - therefore, its placement is crucial!
If you put it in an area where it might be read by the postal services machines, it could be confused for a post code, which would delay its delivery. And if you write it too close to the stamp area, it might be stamped over, causing the receiver some problems deciphering it!
So here are some handy dos and don'ts to consider when writing the Postcard ID:
DO:- do write it on the left side of the postcard (direction of text is unimportant)
- do write it more than once on the postcard - in case part of the card gets damaged
- do double check that you wrote it correctly
- do not write it under, above or to the right of the address, because it might be read by a mail sorting machine and confused for the postal code
- do not write it next to the postage area

Hope that helps!
PS - Can't figure out the Postcard ID on one of the postcard you've received? Fill out the Unknown ID form and we'll help you out!


45 comments so far
Many times, I miss the postcard ID which is printed on top of the address. Because when I received a postcard, I read the message part first. After reading a few times, still can't find the ID. Then I spotted it on top of my address.. Urghh! X-O
Reading my own address is the last part I would do. I prefer the ID is written in the message part and not on the same area as the address.
I only write the ID once, though.
You should recommend people to write the username next to the name. It helps the person who recieve the postcard, in case of the ID is missing, wrong, unreadable or even smudged.
Ex: Manú (Sapic12)
I also put the postage on first whenever possible so that I don't cover any writing when I get carried away with adding fun postage.
Myself i putthe ID on the top left hand side and on the bottom left hand side with my name and nickname. And i always highlight the receivers name and the ID number so that it jumps out at you! ( so i hope anyway, i've never had any complains!) But i paste my cards with stamps and stickers anyway because i don't like empty cards!!
But it happens often that people print out my address and they always leave the ID number attached, is it an idea of mine or do this cards take longer to get to me.....??
P.S. You should put this message in another color to get more postcrossing users to read it!!!
I agree that you should look into the ID being right over the address when it's printed out - most people leave it there and don't add it elsewhere, and it's not convenient at all - well, maybe for the sender, but certainly not for the receiver.
I usually use a colour different from the one I'm writing the message with for the ID, and I write the ID twice, too - once at the top and the second time wherever it fits (at the bottom or down the middle mostly). I've had very few problems so far and I've sent over 2,300 cards.
Example: "BE-12345 from user Stasele".
I got a few cards with unclear ID, and the Postcrossing tracking service has always been successful in identifying the sender in a very short time via the "Unknown ID form".
By the way, I would love to read more about how you do it on the blog some time... it is so amazing!
Thank you for this very useful blog entry, I am sure it will speed up the travel of many a postcard from now on! ;)
And I am another who is grateful to the bookcrossing team for their always-fast service in helping to find the sender when I can't read the number or when it is missing. Great work! And good advice here.
I use bright colors for writing the id on the card.