I have received a message telling me my card is invalid. What should I do? Check that you are correctly entering your 16 digit Nando’s card number on the back of your Nando’s Card. If you continue to see the message, please contact our Customer Support team Related articles Can I Book A Table? How Do I Check My Chilli Points And Rewards? I’ve received a message telling me that my card is already registered. What should I do? I already have an old Takeaway/Delivery account. How will these be affected?