Take a personal check along. I was planning on paying by using the payment button but after signing my name about 50 times to a pile of paperwork and then inspecting the car, I found that my Tesla account no longer had the payment button and instead said credit approval was pending. Even though I had already accepted the credit and even signed off on the credit papers. My SA said that happens sometimes and just to ignore it and pay by personal check, which I had brought along just in case (140 mile drive to Tampa so I brought everything under the sun along as they only give you a 3 day window and a 30 minute window on the day you pick). Happy red model 3 stealth owner now .