in a property where their electricity supply is activated and billed through a key or a card, which they can put credit on by going to a local shop. if you have recently moved to a flat or other property where you will pay your electricity bill like this it is important that you are given the electricity key/card when you move in. you will then need to phone e.on on 0345 303 3040 to give them your personal details and make sure the key is active. if you experience any issues with your meter, such as your credit not being registered then you can use the same number to 