Creditor Queston on Matrix

I have a stupid question. I listed AT&T / Bellsouth Advertising on my matrix for past business advertising expenses and I received a phone call from them today asking me to pay them for my ex-husband's AT&T / Bellsouth Advertising bill of $650. I told them to contact him and that I filed bk for what my business owed them. I assume he listed my number as a contact when he opened the account. That sneaky so and so.

My question is, if I listed AT&T as a creditor on my Matrix for my business, would I have to pay to file an amendment to add them again for his bill or would listing them once take care of any amount I owe them? If that is the case, why are they calling me now since I'm filing personal bk not in the name of my business?

Does the discharge cover me against any amounts owed to the creditor, or do I have to specifically list this debt?

This is a dumb question, but I just want to be sure. I don't want to make a $650 mistake.

P.S. I have my home phone with AT&T and if they ask for a giant deposit, I'm switching to another carrier.

While you were married, did you and ex live in in a community property state when some or all of his AT&T charges in question were billed? If you did, then it's possible you could be held responsible for whatever portion of the bill was created while you were married.

However, if the charges on his bill are all from after your divorce and you didn't co-sign an official form stating you agreed to be a co-owner of the utility bill, then you owe AT&T nothing for your husband's bill no matter what the circumstances.

Yes, the charges occured while still married and living in a community property state, so I'm almost 100% positive I'd be held responsible for those charges as well.

Since I listed AT&T on my creditor matrix already, is it a safe bet to to an amendment to my creditor list even though it's the exact same company, for the same type service just a different account? (Sorry, I haven't had a chance to talk to my atty. about this yet, just thought I'd get some feedback)