My wife, dual Polish and American citizen, and I are considering moving to Poland to retire. If I just have my Social Security deposited into an American bank and live off credit/debits cards how would Poland be able to tax my retirement?
If I were you, I would ask a family member to withdraw the money for you and send it via westernunion or similar... Otherwise, you'll probably end up paying taxes for both governments :)
They may still control debit card transfers and western union for sure. Take cash little by little (I think you can take $10K per person every time you go Poland with no taxation).