I'm talking about the handheld signature devices that the UPS guy has, or the credit card POS system that stores have you sign with the stylus on when completing a return.
It's always a completely blank white screen with the whole screen reserved for a signature. It always bothered me that I have to sign, but there isn't even a hint of what exactly I am signing. When I ask the employee it's always some generic answer, "You're signing that you received the package", or "You're signing that you returned this item".
Are these signatures even legally binding, given that I don't even know where to find the contract's terms if I wanted to?