Shiptheory Support

This error means that a Postcode for a shipment is invalid and needs to be checked.

Example of an incorrect postcode:

This postcode doesn't exist therefore will bring back the response The Postcode GL891KD is invalid.

Example of a correct postcode:

This postcode exists, so this shipment will book in with your courier correctly.

If you have amended the incorrect postcode and are still getting this error please don't hesitate to contact support at support@shiptheory.com or 0117 403 4313