There is probably a preference action here by the trustee. Certain payments made by the debtor within 90 days (or 1 year, if the payment was made to an insider) prior to filing for bankruptcy, can be avoided by the bankruptcy trustee. There is an assumption that parties were being given a preference and paid before other creditors and that they were not entitled to the money.The trustee can demand that you pay back certain payments you received within 90 days (or 1 year) prior to someone's bankruptcy filing. You will then share proportionally any payments, if any, with other creditors. If you received a trustee's demand letter, speakwith a bankruptcy lawyer because there might be defenses to the trustee's preference action.