Another Canadian cold shoulder: PayPal
Used to be, you could use PayPal for most auctions.
Then auctions started appearing that would only accept PayPal with a Confirmed Address. Getting a confirmed address in Canada is hit & miss. The system is completely automatic, so IF your CC issuer supports the protocol to allow PayPal to query for your address, it works. Otherwise it doesn't. There is no other option, no human can do lookups, make phonecalls, or otherwise interfere.
Logic suggests them that a select an issuer that supports this electronic query protocol. How do you find one that does? Well, why not ask the issuers? What makes you think they would know what the f*** you are talking about? The problem is, when you say "PayPal" they lock on that word and insist they "work with" PayPal because people charge stuff on their cards through their PayPal account. You can't explain the subtle difference between charging amounts and address verification, because "working with PayPal" only means one thing for them.
It just so happens that the Canadian Tire Mastercard supports this protocol, so I applied for one, attached it to my PayPal account to verify my address and have never used it since (PayPal charges go on a different CC).
So after all that BS, now sellers are starting to refuse international PayPal, confirmed address or not.