The BPAY Validation Rules provide billers with a flexible method to ensure that their customers correctly enter their BPAY Customer Reference Number (CRN) at time of payment.

Validation Rules work in tandem with other CRN Validations, such as the check digit routine and CRN length, to provide additional data reliability at time of entry.

Essentially, the Validation Rules perform additional checks on the CRN at time of entry to ensure that the CRN is accurate. The following examples illustrate how billers can apply the Validation Rules, ultimately simplifying the reconciliation process upon receipt of the BPAY payment details.

• A biller who prefers to fix a particular part of their CRN to be one or more digits can do so with a Validation Rule. For instance, the first and second digits of the CRN can only be 56 or 66, which is authenticated using a Validation Rule.
• A biller who has multiple billing systems that generate numerous CRNs with different check digits who prefers to have only one biller code can use Validation Rules to perform this confirmation. For example a biller may want all CRNs with a length of seven digits to use a MOD10V01 check digit routine, and all those with a length of eight digits to use a MOD10V05 check digit routine.

There are many other scenarios that can be supported by Validation Rules. Any biller wishing to utilise an existing Validation Rule or set up a new rule should contact their financial institution.