Wait for the new code. It reaches you within a maximum of five days.
The background: the address verification code is updated with every address change. Have you requested a code, then changed your address data and triggered another address verification? Then the previously received code automatically becomes invalid.
Note: In this case, please do not make any further address changes.
If you have requested several codes, use the most recent one. Pay attention to the exact spelling. If the error persists, submit a request via the ePost support platform or use the support chat (at the bottom left of the platform). If possible, have a screenshot of the error message ready.