I'm in the UK where they're still using paper cards.This is why they have introduced the idea of incorporating the proof of vaccination into the vaccine itself. You will soon be scanned to show that you're a good little bioluminescent slave. They will probably introduce this after blaming a huge outbreak on someone with forged proof. All of this is coming unless we say "no".
Cash or a time share on the Costa Del Sol, whatever works.bribe them with what?
very soon all currency will be digital and it will be very difficult to pay someone "off the books"
they've also got microchips that will process all of this data automatically inside your body, so it's very likely this technology will integrate with society eventually, meaning you will need a vaccine jab to function in the same way you need a key for your car
it's a brave new world \o/