To transfer ownership of the account, you need to process a transfer of billing responsibility which you can do online at: https://att.com/tobr However, since you have a bundle, that probably means combined billing and that may interfere with that.

And if you have DirecTV (this is their forum), be aware that you cannot transfer responsibility of TV service unlike an individual phone line.

What AT&T bundle do you have? As the first post suggests, you should try the AT&T Community Forums as this is the DIRECTV Forums. AT&T forums direct link: forums.att.com 

What AT&T bundle do you have? As the first post suggests, you should try the AT&T Community Forums as this is the DIRECTV Forums. AT&T forums direct link: forums.att.com 

What AT&T bundle do you have? As the first post suggests, you should try the AT&T Community Forums as this is the DIRECTV Forums. AT&T forums direct link: forums.att.com 

I’m being deployed overseas for a 2 year assignment and my partner is going to take over the payments of our bill