EPOSGEAR Card Minder RFID Blocking Anti Theft Secure Protector Sleeve Holder Wallet for Credit/Debit/ID Cards - Prevent Fraud, Theft and Accidental Payments (1 Sleeve) There are also possibilities of wireless transactions being completed accidentally or duplicated. You can prevent most of these things happening however with the Card Minder - the aluminum credit card pouch can fit inside your wallet/purse and can prevent your data from being stolen. Furthermore the Card Minder could prevent two contactless cards in the same wallet/purse being billed simultaneously. Ideal to place in any wallet or purse. The Card Minder has the following features: Includes RFID blocking technology to prevent unauthorized access to personal information - Fits easily in wallet card slot or in a purse - Lightweight to carry - Suitable for a range of cards This product protects the following type of contactless cards: All payment cards - Student IDs - Transit cards such as Oyster - ID cards - Access cards operating on frequency 13,56 MHz Can prevent: False Payments - Unauthorised Payments - Duplicate Payments - Using the incorrect card to make wireless payment - Fraud - False transactions on Oyster Cards With the introduction of contactless payment, thieves are adapting to come up with new methods to steal your personal data and information. On most new credit or debit cards you will have a wireless symbol which informs you that your card uses RFID technology, this allows you to simply swipe your card at designated machines to make a payment. This is a much easier way of paying, however it comes with security risks, as a criminal could steal your details.