SUB2 - Online access to seller's mortgage info

[Account Closed]

I now have a motivated seller who is willing to go the “subject to” route; however, like many homeowners in a military town his mortgage is through USAA which is also his bank. 

USAA's website is essentially a "one stop shop" for all their member's accounts/mortgage/insurance etc; meaning that having access to his mortgage information online, I would also have access to his checking account etc. We’re not closing until next week, but I foresee it being an issue. In order to have full control of the property, I require having online access to the account as well as paper statements/correspondence regarding the mortgage sent directly to me. 

Is there any way to separate the two? Has anyone come across this issue? I would rather figure it out here, than have to talk to the bank. 

Lloyd Stanton.
American.