Some people get around this by getting a letter from the original owner saying it was a gift purchase. I find that highly unethical but if you were to ever buy a Canon product for another person and wanted to give it to them as a gift, include a letter saying it is so in order that they may be able to get warranty work done. Many people that get such gifts are simply able to tell Canon it was a gift and that is often all that needs to be done.
I just had an expensive ink cartridge fail on my Canon 5100 printer. The cartridges are something like $75 each. Canon didn't have record of my extended warranty. They sent the replacement out for free regardless. Sometimes it just comes down to who you are dealing with on the other end of the "phone".
Guys... That is Sal Matarazzo's email address from Canon CPS, the Pro people. Now, I've gotten lucky in the past, and Gary's a great close friend of mine, but what Sal says is true. Doesn't matter who you get, this is the guy that "approves" those decisions.
Besides... he's the top manager in the CPS department. No one to go higher up to other than Canon H.Q. in New York.