Some in Sweden are fighting to preserve cash payment.

The most basic way to resist surveillance payments is to insist on paying cash, except in situations where your name is already known, such as paying taxes or utility bills. Refuse to pay stores in non-cash.

If you have a few minutes to spare for the cause, go into a store which sells things you use, and ask the staff, "Do you take cash?" If they say yes, buy something. Otherwise, say "I pay only cash; I will buy somewhere else."