Toy Hauler trailer, paper work?

About 5 years ago we sold our Bluebird in Tucson. I had not canceled the permit on our way out of Mexico. I had the name of the person in Mexico City and her address. I also had a notarized bill of sale and a copy of the title transfer papers. Went to Estafeta and sent the whole package. Next morning I got a call from the delivery driver in CDM. They would not accept the package. The address was correct but the woman listed on the parcel was now somewhere else. Apparently if it is not addressed correctly they cannot accept??? Only in Mexico I found the name of the new person and Estafeta gave me back the parcel. I readdressed and we left for Canada. Got a registered package with everything I had sent. They needed either a signature on a document from the Secretary of State ( we don't have those in Canada or something from the Arkansas DMV where the buyer resided. Fortunately his wife was a Notary and new how to handle everything. I resent the package and 2 months later the permit was cancelled. I think I paid about $150.00 for all the shipping. I am not sure if they still link your passport to the permit. Moral of the story is to look upon your 10 year permit as annual. When you leave Mexico have the permit canceled. Chuck is fortunate that he lives in California and could easily return to the border with his unit and have the permit canceled. Not so easy when you live 2200 miles away !

Moisheh