A replacement gas card or electricity key is free to the end-user. All we ask is that the key or card is registered on the Payzone equipment before leaving the store. Registration is free and, all you need before you can register your key or card is a code (RTI) from your gas/electric supplier. Find your nearest stockist of blank keys and cards (Super Agents) and type in your postcode on our Store Locator. Stores that hold replacement gas cards or electricity keys are green (non-Super Agents are pink).