‘API Authorization failure. User XXXXXXXXXXX is not authorized to use API DeliveryConfirmationV3’ message will prompt when trying to generate a USPS Shipment Label.



"The user xxxxxxx is not authorized to use API DeliveryConfirmationV3" means that you needed permission to use the Delivery Confirmation API. Please call USPS and ask to enable this option in your account.


Applicable Product:

All Connected Business 13

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