Requires public utilities to maintain customer billing records for duration of account and to refund full amount of any overpayment by customers.

This bill (A3308) requires New Jersey public utilities to keep complete billing records for the entire duration of a customer's account. It mandates that utilities refund customers in full for any overpayment made, including interest as specified in existing law (P.L.1987, c.211). The key mechanism ensures utilities can accurately resolve billing disputes by maintaining detailed historical records. This directly affects utility customers who may have overpaid and utilities responsible for record-keeping and refunds. The bill takes effect immediately upon passage.