Double billing can occur when changing energy supplier and involves both the new and old supplier charging for energy usage in the overlap between the end of one contract and the beginning of another. In short, the user is paying for the same energy twice.

One of the major causes of this are incorrectly processed meter readings where the new supplier makes an estimate of usage but the old supplier, for whatever reason, does not receive them or does not process them correctly. This can lead to a final account figure missing on the old supplier’s system and therefore the old supplier will keep billing the customer until a final official reading has been logged in the system from the new supplier.

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