How do I top up with cash?

The retailer needs to scan the barcode on the back of your virtual or plastic card or swipe the plastic card. You can also use a printed copy of the barcode.
You will receive a receipt that includes a 20 character Unique Transaction Reference Number
Why do I receive a 20 character Unique Transaction Reference Number?
There are 40,000 epay top up points in the UK.
You can find the nearest top up points at www.smart-prepay.co.uk/top-up-points
Normally a message will be sent immediately to your meter topping it up automatically – you don’t have to do anything.
However, just in case the message is delayed, you can top your meter up immediately by entering the 20 character Unique Transaction Reference Number using your In Home Display or the keypad on the meter.