[General Discussion] Signing credit cards

The signature at the back of the credit card? Most likely the result of path dependence and inertia. Especially with RFID cards these days.

The situation that you described, of a cashier asking you to sign an unsigned card and the charge slip, and then studiously compared the two, happened to me twice before. When I pointed out that of course the signatures would match, the clerk would only mutter about rules being rules. I chalked that up to Singapore's educational and political system creating worker drones incapable of thinking outside the box. I am glad to be proven wrong - that this sort of thing happens in the United States as well.

As for signing the charge slips, that's so the bank has some sort of evidence if someone would dispute any charges.

Jam it back in, in the dark.

I don't have those newfangled RFID cards, but I thought you had to enter some kind of a PIN to authorize the transaction. Don't tell me the banks are saying, buy an RFID shielded wallet (or pouch) for your credit cards.

There's nowhere I can't reach.