This is the part that sucks. It's not the receptionist's problem, he/she just wants to get on with their day. Generally they're powerless to do anything anyway.
Last time I went to urgent care they had one of those screenless digital signature collection pads. "I just need you to sign a couple intake forms" and she motioned at the pad. I asked what I am signing, and she said "just some intake forms." She looked at me like I had six heads when I asked to see the actual forms, as if no one had ever done that before, then took a few minutes to find them.
Felt bad for making her life harder. Makes me wonder if something like that is even contractually valid: how can you collect a signature "on" a form that you don't even show the signer?