The explanations of the UPS Troubleshooting is listed below;

Error Code	Error Description	Warning Message
120100 Missing or invalid shipper number error	In order to solve this problem, the shipper number (account number) should be added to the ups.com profile. You can follow the listed steps. Log in to ups.com (Be sure to use the same User ID and Password that is in your Shipping API) Select Account Summary from the My UPS tab rollover menu. Verify that your account is listed; if not, select the Add a UPS Account link Follow the instructions to add the account
120121 The Shippers shipper number cannot be used for the shipment	The error “the shippers shipper number cannot be used for this shipment” typically means the UPS account has been suspended - usually due to billing details expiring.   Please contact UPS at 1-800-742-5877 and work with them to reactivate the shipper account
128100 Invalid sold to state province code. Valid length is 0 to 5 alphanumeric	In order to fix that error, please update the correct state definition field or state code of the customer address.
If labels are coming from UPS- Surepost but it is not the requested label carrier.	UPS- Surepost toggle should be false on Shipping Option Selection from the Carrier Management screen.
120075 Shipper is not authorized for Mail Innovations	Your account is not available for UPS MI services.  Please contact UPS at 1-800-742-5877 and work with them to activate the UPS MI account

1)120100 Missing or invalid shipper number error

In order to solve this problem, the account number should be added to the ups.com profile. You can follow the listed steps.

1. Log in to ups.com (Be sure to use the same User ID and Password that is in your Shipping API)
2. Select Account Summary from the My UPS tab rollover menu.
3. Verify that your account is listed; if not, select the Add a UPS Account link
4. Follow the instructions to add the account

2) 120121 The Shippers shipper number cannot be used for the shipment

The error “the Shippers shipper number cannot be used for this shipment” typically means the UPS account has been suspended - usually due to billing details expiring.  

Please contact UPS at 1-800-742-5877 and work with them to reactivate the shipper account.

3)128100 Invalid sold to state province code. Valid length is 0 to 5 alphanumeric

In order to fix that error, please update the correct state definition field or state code of the customer address.

4) If labels are coming from UPS- Surepost during RateShopping but it is not the requested label carrier

UPS- Surepost is the cheapest shipping option in most of the cases. If the system assigning SurePost during rate shopping and you don't want to use that, Please disable UPS Sure toggle on Carrier Rate Shopping screen detail Choose button

5) Hard120075 Shipper is not authorized for Mail Innovations

Your account is not available for UPS MI services. 

Please contact UPS at 1-800-742-5877 and work with them to activate the UPS MI account.

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