Hilton Garden Inn Oklahoma City Airport

Through one of the stuff menber, Rymma, at booking.com, they kindly & quickly changed the room furnished with one king-bed into 2 double-beds. I really appreciate it.

This is a not Complaint but a question & a thing to make sure of: (q1: What happened to my jcb card???) When booking a room in a hotel on the Internet, I let them know my jcb card number and was guranteed to stay there, and then upon check-in there, I was asked to show the jcb card (as written in an important information like 'Upon check-in, Photo and id is required'), there was no problem. However when I checked out, exactly the same jcb card was not accepted. Since I happened to have a visa card available, I completed paying with no problems. (2: a thing to make sure of) My wife & I mistakenly forgot to return 'Plastic card key to door' to a clerk. Should we mail each of them to Hilton Garden Inn Ok City Airport from japan???