Error message
PaymentInformation/Prepaid/BillShipper/AccountNumber must be the same shipper number as Shipper/ShipperNumber
Carrier: UPS
What this means
UPS rejected the shipment because the billing account number does not match the UPS shipper account configured for the shipment.
This is a UPS carrier configuration issue.
How to fix
Open the RMA.
Confirm the shipment is using UPS.
Regenerate the label once.
If the error continues, contact Swap Support.
Include:
RMA ID
carrier name
screenshot of the error
If the issue continues
This issue usually requires internal carrier configuration review by Support or Tech.