[decadentcactus]

I had that idea a while back (haven't done anything with it). I was thinking more along the lines of separate PIN numbers for ATMs/at checkout. You would set up different PIN numbers on your account (on the bank website), with specific conditions, like transfer limit, time limits, $X allowed per day.

> Card, PIN 1234 -> bank -> access John Smith's account -> access "1234" setting (max transaction of $50 otherwise declined).

> Cart, PIN 2345 -> bank -> John Smith -> 2345 is only valid on weekdays

I originally thought of it as a way for parents to loan kids their cards, give them a temporary PIN to use.

Might make more sense to adapt it into the CVV system (or a new system), where each specific CVV would correspond to a setting you determine. They can be created by you quickly and securely with a bunch of constraints.

But then I realised I had no idea how CCs worked, and assumed I'd either have to get a bank on board, or a CC company to implement it, and gave up.