A thing that I’ve learned in my life is that American pizza franchises have an extraordinarily robust set of protocols in place to prevent people from placing pizza orders internationally, and the reason I know this is probably the same reason those protocols exist.
It’s just pizza for some reason, too. For any other form of online ordering, I can place an order from Canada and have stuff delivered to an American address. Even for most other types of food I can do this, as long as the delivery address is in their service area. Pizza delivery franchises specifically? No dice – they really, really don’t want non-Americans ordering pizza, not even if it’s going to a valid address.