Do RFID blocking cards actually work? My Flipper Zero revealed the truth Posted on April 23, 2023 By Charlielikes Credit and debit cards contain RFID contactless technology. Can an RFID blocking card keep someone from “reading” your card without your knowledge? I put it to the test. Tech Tags:‘blocking, “my, ‘work, actually, cards, do, flipper, revealed, rfid, tech, technology, the, truth,, zero