These are bills that are given to a customer that does not reflect the correct consumption of the customer’s consumption. Such bills usually come in the form of estimated bills where the electricity distribution company gives the customer an estimate that far exceeds what that customer could possibly have consumed within the billing period.
ERA as guided by the Electricity Grid Code 2003 only allows the distribution company to estimate the customer’s bill for only 3 months.
All electricity distribution companies are not supposed to estimate the customer’s bill for more than 3 consecutive months. This is to ensure that the customers pay for only what they consume.