As soon as you link a card, we encrypt your card details with bank-level security systems – replacing the details with an ID number or token. All we keep is the last 4 digits of your card number and the card’s expiry date. We keep these so that we can display your card correctly within the app, and so that we can remind you when your card has or is about to expire, so you can link your new one. Also, because we don’t store your CVV number, once the card is encrypted and tokenised, we can’t see the details, accidentally use it in a transaction or access it – and nor can anyone else. This ID number or token ismeaningless and out of context, even to us. So nobody will be able to identify from our system which card is yours.