ACH Return Code R10 indicates that the customer has advised their bank that the transaction was unauthorized, improper, or ineligible.
What causes R10?
The R10 return code occurs when:
- The customer claims they didn't authorize the transaction
- The transaction violates the terms of authorization
- The entry is not in accordance with the agreement
How to resolve R10
- . **Review authorization** - Verify you have proper consent
- . **Contact the customer** - Discuss the claim
- . **Provide documentation** - Show proof of authorization if disputed
Prevention tips
- Maintain detailed authorization records
- Get explicit consent for transactions
- Communicate clearly about charges







