Australia Centrelink CRN Validator
Online Australia Centrelink CRN validator. Verify format and check digits.
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How is the Centrelink CRN validated?
The Customer Reference Number (CRN) is a unique identifier assigned by Centrelink to individuals receiving social security services or benefits. It contains 9 digits and a trailing check letter.
Our tool calculates the check letter using a weighted Modulo 11 checksum mapped to a static array of alphabetic control values.