Transfer responsibility of ATT Bundle

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 

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. You don’t actually need to transfer ownership. As long as your partner has login credentials and the account pin, they can pay the bill and engage support, if needed. You could also put the bill on autopay and your partner won’t need to do anything.