Our Ampy Card Meters come coded as either A, B, C or D. This is a security measure to help protect landlords and managing agents from tenants who may try to obtain cards fraudulantly. Therefore, programming cards and meter cards must be of the same code as the meter to work. If you already have a Ampy Card Meter, but are unsure of which code it is, you can check either your programming card or meter cards which will have it printed on. If required, a meter re-coder can be hired, please call 01803 295430 to find out more.