UPS not connecting account - error message

Jon8 — Sat, 20 Sep 2025 19:52:57 GMT

Hey All,

I was looking to see if anyone has had this problem before with connecting UPS acct to Square. I receive an error message -

"Your registration unfortunately failed due to the following UPS error: The Shipper Account is already linked to an existing User Name."

I have contacted UPS and they are looking into it - I spent at least 6 hours on the phone with them today ( several calls last week) - finally, and hopefully, got to the right person who's "looking into it"

We are connecting an existing UPS account and use the invoice method to connect the account. I remember I had this issue a few years back when we used a 3rd party ship software and I had to enter a UPS local phone number and that fixed it.

Just looking to see if anyone had experience with this and what the solution was as I don't have faith that UPS will fix it, since it appears to be on their end.

Thank you!

Re: UPS not connecting account - error message

WineSneak — Thu, 18 Apr 2024 23:39:06 GMT

I am having a similar issue but without any error messages. The system doesn't seem to do anything.

thread Re: UPS not connecting account - error message in Payments Troubleshooting

UPS not connecting account - error message

Re: UPS not connecting account - error message