When handling Return Labels through eHub, you will find the typical Service Codes (Priority, First Class, Parcel Select), but when being used for returns, the low level service codes that get sent to the carrier are different from regular shipping.
When attempting to handle return labels, eHub expects the following codes for the following services:
SERVICE LEVEL FOR RETURNS | EHUB LOW LEVEL SERVICE CODE |
Priority Mail | 1038 |
First Class | 1039 |
Parcel Select | 1040 |