I booked a ressie using the Disney Visa code. I used my "flyer mile" credit card for the deposit. When I learned of the potential problem of not using a Dis Visa, I called to let them know that I used a different card. They said they knew, and my ressie didn't have the Dis code, but had the code for those calling in on the 4th or later. They said they were "holding" my ressie until the 4th. I changed it to my Disney Visa, because I didn't want to take a chance with them waiting for the other code.