E-Signature Documents getting sent to unintended e-mail receipient

When we send a document for e-signing via e-mail we set it up so it sends to the intended receipient and also set colleague gets a copy too.

However, everytime a document is sent it also gets sent to the same separate e-mail address everytime too. We believe this was the e-mail address the account was originally set up on.

The problem is we can't find any where in the account or e-signature settings that references this e-mail address.

Any advice would be greatly appreciated.

Thanks in advance.