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C34: Provided ABN Number/ Exemption reason is not valid
An NDIA bulk payment request rejection code, from the NDIA’s own guide (December 2025).
C34
The message
“Provided ABN Number/ Exemption reason is not valid”
What it means
The ABN or exemption reason is not valid.
Where to look
Check the ABN passes the ATO check digit test, or use REIMB or EXCLS. The claim file checker tests this.
Other claim codes
- C01: Service booking does not exist.
- C02: Service booking for the product entered is still awaiting approval.
- C03: Support start/end dates entered are outside the service booking dates.
- C04: Quantity entered is more than the approved quantity in the service booking.
- C05: No approved service booking exists for the selected product within the selected start/end dates.
- C06: The price entered exceeds the price of the product approved in the selected service booking.
- C07: Participant does not exist in the selected service booking.
- C09: A payment request can only be submitted until 90 days from the service booking end date.
What this tool follows
- NDIS myplace provider portal: Bulk payment requests self-help guide for providers (December 2025): Part 3, payment request rejections
General information only, not financial, legal or claiming advice. Always check a claim against the current official documents.
Questions people ask
What does NDIS claim rejection C34 mean?
C34: "Provided ABN Number/ Exemption reason is not valid" The ABN or exemption reason is not valid.
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