A history of missed payments is the first sign that a customer may not pay for electricity they have used. Therefore, a customer without a deposit may eventually be required to pay one if they develop a history of late payments, missed payments, returned checks, bad-debt write-off, or service disconnection due to non-payment.
Similarly, a customer with an existing deposit may be asked for an additional deposit if their existing deposit does not cover two months worth of electricity usage. Additional or new deposits on existing accounts are billed in three monthly installments.