^^^^^^^I haven't. Although my neighbour just imported one to Canada from the US. He said he will never do it again. He paid $500 for the car, then had to pay over $2000 in takes, duties, and other fun stuff. Then they told him that they could not let the car across the border until he had proof of ownership, and a bill of sale was not enough because, and I quote "they are too easily faked." He ended up having to go back to Washington where he got the car, register it, insure it, get all of the apropriate paperwork for it in his name, and then they finally allowed him to bring it across the border. So, if you want to import a car from Canada ... Don't, it'll cost you way more than it's worth, in both time and money.
to bring a US car into the Canada. You 100% have to give U.S. Customs and Border Protection (CBP) 72 hours notice. Please check the links I provided.Don't listen to EITHER of these two people above.
You DO NOT HAVE TO send a copy of ANYTHING to the Canadian border. You simply have the Bill of sale in hand, the TITLE and ACTIVE Canadian Insurance on the car and CURRENT Tabs.
You fill out the import paperwork at Customs, and THEN the fees he mentioned are taken care of, but there is no time frame to send info ahead of your arrival for a purchase here to go back up there. Took the guy that bought my Ghia about 2 hours to get home and he lives in Victoria BC. It's simply not that hard to do.