Re:Postzegelcode
by pacifika on Sunday June 30, 2024 @04:46PM
(#40840237)
Then you can write any code down and wait 5 days to send it
[ Parent
| on HN ]
You can, but an invalid code is treated as if there was no postage stamp on it at all. So your letter will be returned or the receiver is asked to pay.
A code that's past the validity date is probably considered an invalid code as well.