Yeah, but what will the customs agents consider as "the proper paperwork" and "the proper procedure?"
The times I bought a used vehicle or trailer, I get a "bill of sale" which is little more than illegible chicken scratch on the back of a used napkin. The DMV has always accepted it as proof, but it's so easy to forge something like that, that how can it possibly be considered as irrefutable legal proof?
They have forms for everything else, but not that. It makes no sense.
One thing that does grease the wheels crossing the border is if you have model airplanes in the RV. The customs agent is usually so fascinated by the model airplanes that they forget all about anything else.
