Every carrier checks the customer's postcode before it creates a return label. If the carrier doesn't accept the postcode, the label fails. There are two common reasons, and you can usually fix both yourself in a minute.
For all other label errors, see Shipping label error troubleshooting.
Good to know: In a return, the customer sends the parcel back to you. So when an error says "sender," "shipper," or "ship from," it's referring to the customer's address, not your warehouse.
Find the correct postcode
Postcodes are managed by each country's national postal service, so use the lookup tool for the customer's country, whichever carrier you use:
Finland: Posti postal code search
Other countries: use the national postal service's postcode search, or check the address with Google Address Verification (search for it in Google Maps).
Postcode in the wrong format or missing
The error may say:
PostalCode error: INVALID_PATTERN. Supported pattern: NNNNNPOSTNORD: Label creation failed - General client indata error"The shipping label couldn't be created because the postal code provided is not in the correct format"
The sender's postcode has not been sentCarrier Postcode not found. Expected formats: AT - 9999(4)Carrier Error when quoting: must be a valid postal code in NORWAYLe code postal de l'expéditeur ne correspond pas au pays
Why it happens: The postcode is missing, or it doesn't match the format the carrier requires for that country. In a pattern, N means a number and A means a letter. For example, NNNNN means exactly five digits, with no spaces or letters.
How to fix it:
Open the order page, click the customer's name, then the Edit icon (pencil).
Add or correct the postcode so it matches the format in the error message. For example, a Swedish postcode is five digits without a space:
50344, not503 44.Click Save, then Retry.
Postcode rejected even though it's correct
The error may say:
PostalCode error: INVALIDA message saying the postcode is invalid or not found, even though it's correct on Google Maps
Why it happens: Carriers sometimes reject a real postcode that is new or not yet updated in their system. This can happen even when the postcode is correct on Google Maps.
How to fix it:
Look up the address in the postcode search for the customer's country (see "Find the correct postcode" above).
Update the postcode to match, or use a nearby postcode on the same street (for example
50344→50338). Enter it in the format the carrier requires.Click Save, then Retry.
Note: The street address and city matter most. As long as they're correct, the carrier will still collect the return.
Still not working?
See Shipping label error troubleshooting for other address errors, or contact support@yayloh.com with the order number, the full error message and the customer's country.