Expired TIP

I returned to the USA/Canada with a still valid 10 year permit. I was going to go the next day and cancel at he border. But the person that bought my unit wanted to go home right away. I went through hell!! I was still in Mexico and had the proper form. I went to a Mexican parcel service and paid for next day delivery. The driver called me from Mexico City. They would not accept the dociment as it was addressed to a woman who wss trnsfered to another area!! privacy issues. The next day I picked up the document. Called and after about an hour got the name of the new person.Resent the document. 2 months later I got a phone call that they needed a copy of the new owner's registration certified by the Secretary of state for the new state. I was lucky that the new owner's wife was a notary and she notarized document from the Registrar of vehicles. I was in Canada and I had to send it DHL. 30 days later I received the cancellation. I do not remember the total cost but I think I could have flown to CDMX for less pesos!!!!