The form the broker in question needs from Canadians in order to continue renting our points is actually a number- an ITIN number. It's a bit of an arduous process to get one, but if you want to keep renting points with this broker and/or want to avoid unnecessary hurdles if you ever sell your
DVC, it seems like a very worthwhile investment of time to get it.
We actually got our ITIN numbers as an add-on of sorts to a contract we bought last year, as our sellers were also Canadian and our broker convinced the person in charge of getting their numbers to do ours as well, at no charge

.