What about joint credit cards?
To close joint credit cards and the like, formally write the creditors and notify them of the impending divorce.
Request that the account be closed and that the cards be canceled. Ask them to provide a current statement of account and make them aware of the fact that you do not intend to be held liable for any and all debt accumulated after the date of the written letter. It is wise to send these letters by certified mail to retain proof of receipt by the creditors. In some instances, the creditor will ask that the outstanding balance on an account be paid in full. If it is possible to comply with this, then do so. If not, at the very least, have them place the account on inactive status so that no new additional charges may be added and stipulate that once the balance is paid in full, the account is to be closed completely and forever.