Yep, I like the clip board idea. Those lost keys are expensive.
When we bought our Acura, we were waiting for the salesman to bring us the second key. They couldn’t find it anywhere, and this was on a new car. Couldn’t believe it. They had to order one, then we had to bring the car in again to have the key programed etc. What a hassle. On the work order, it was noted that Service charged the cost off to Sales. I’m sure it was upwards of $200.