Valet Parking Security Questions for Guests?

Should we have a special form or procedure for the valet parking Security in the hotels? Or list of questions which we need to ask the guest before handing over the car key?

In fact, if you ask for signature on a form when guest parks a car, you just need to compare the signatures, and in your case, you just don’t feel certain, ask if you can take a photo of him, kind of things, you may persuade him to wait and let you and AM of your hotel to check his car first with his key, then you return to ask questions, I bet only the real owner can answer those questions correctly, but this kind of stuff apparently hurts the guest,s feeling, so don`t go too far.