Well, if he thinks a JCPenny bill has any bearing on his child support, he's an idiot. Did your decree have the generic wording about each party being responsible for the debt in their own name? Did you use the card after the divorce? If you were using the card, that could definitely change things, especially if it's his account. The decree will often say that you agree to not use each other's credit also. Using the card would put you in a bad position.

