Authorized User on Girlfriend's Cards. Am I legally obligated?

I am currently going through a break up from my girlfriend of almost 5 years. We are not married and do not have a civil union (as ohio does not offer them yet). I was put on most of her credit cards as an authorized user when we joined bank accounts and such. I plan on paying half of our debt, because morally I believe that is right; however, I do want to know what I am LEGALLY obligated to pay or what could come back on me later should things not work out as planned. If anyone can point me to somewhere that I can get some good facts, I'd really appreciate it.

Authorized users are not legally liable for the debts unless you happen live in community property state. And since you aren't legally married, the community property rule isn't an issue so... you're basically free to walk away without any legal obligation. Keep in mind you would have to dispute the authorized user accounts in order to have them removed from your credit reports.

Having said all this, I still have to point out that if she added you to her accounts and you helped to incur debts on the accounts, then it's commendable that you're doing the right thing by paying the portion of the debts you helped her incur.