I'm sorry to hear of your dilemma.
You, or your client, can apply to the bankruptcy court
to file a late claim if you want. However, under the law, given that you have notice of the bankruptcy, you must cease all collection activity or you can be found in contempt of court.
You may not accept any payment received based on collection efforts after the bankruptcy was filed. You will need to turn the money over to the bankruptcy Trustee
now that you have been made aware of the filing. You may not continue to hold it until you are added as a creditor---presuming that your principal was not named in the first place. The fact that you are receiving notice late in the game does not mean that your debt was not already listed---and if it was not, it can easily be added.
I wish you the best in 2011.
Because I help people here, like you, for a living---this is not a hobby for me, and I sincerely appreciate your abiding by the honor system as regards Accepting answers. I wish you and your family the best in your respective futures.
Would you be so kind as to Accept my Answer so that I may be compensated for assisting you? Bonuses for greatly informative and helpful answers are very much appreciated. Thanks Again,