1. (a) Where a TP has overbilled a customer, the TP shall make a refund or billing credit in a subsequent billing cycle following discovery and computation of the overbilled amount.
2. (b) When a TP bills a customer an amount correcting a previous underbilling and it results in an undue hardship on a customer, the customer may call and make special payment arrangements unless the underbilling was caused by unauthorized or fraudulent use or procurement of service.

Codification Notes: This section was promulgated as Rule 13.05 of the Telecommunications Providers Rules prior to codification in the Code of Arkansas Rules.