Evergoa

It is only my personal opinion based on my experience as accountant and fiscal advisor. Save the proofs that you tried to transfer back the money without success and that was not your fault. Declare in your yearly Mexican income returns the earnings (as per Mexican regulations) If you get an inspection or something from someone, just tell the truth. And of course, put the cash on a deposit just in case you have to reimburse it in the future. How much to wait until you consider the cash as yours? That is the big question. But with my meassures you assure yourself that you will be in total compliance.