When attempting to rate a return label for the PB Shipping API USPS carrier, the following error message is displayed:
Package 1 has failed validation. Error message from PB Shipping API: 1021119Invalid special service DelCon selected.Invalid special service DelCon for selected Mail Service.
PB Shipping API USPS does not support rating a return label.
Do not attempt to rate a PB Shipping API USPS Return label. Select one of the carrier-specific return services:
- First Class Package Return Service
- Priority Mail Return Service
- Ground Return Service
UPDATED: September 17, 2019