Top Up Codes usually have 20 digits. However, when you buy a top-up after electricity prices have changed you will be given a special 40 or 60 digit Top Up Code, depending on your tariff. This will credit your Pay As You Go Meter with your top-up amount plus update it with the new unit rate. You may also receive a special 40 or 60 digit Top Up Code if for any reason we have to update your Pay As You Go meter.
If you have received a longer Top Up Code, simply key it into your meter as normal.
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