Thanks for all the response. I checked with cc company, they advised using the 3 numbers in the Canadian postal code and adding two zeros . Problem is that it doesn’t work, because there is no such zip code in the US. Only other solution that I’m aware of, is to change address to a US mailing address. Maybe I’ll just have to set up a “ blind” US mailing address during the time spent in the states. Guess I was just hopeful there might be an easier solution....