Generally, a debt that is not listed or scheduled on a bankruptcy petition will not be discharged unless the creditor has notice or actual knowledge of the case in order to timely file a proof of claim. HOWEVER, if it is a no asset bankruptcy (meaning, no distribution would be made), most courts hold that the debt will be discharged even if it was not listed since there would be no distribution in any event. If you have grounds for objecting to the debtor’s discharge, that time period may be extended if you received no notice of the bankruptcy.