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R36 - Return of Improper Credit Entry

A credit was sent under a SEC code that only permits debits - ARC, BOC, POP, RCK, TEL and XCK are debit-only applications.

R36 - Return of Improper Credit Entry

A credit was sent under a SEC code that only permits debits - ARC, BOC, POP, RCK, TEL and XCK are debit-only applications. This rejection is final: resubmitting the same payment will fail again — resolve the underlying situation first.

Data & formatACH · NACHA (US) Final
Can you resubmit? This rejection is final: resubmitting the same payment will fail again — resolve the underlying situation first.

What this code means

A credit was sent under a SEC code that only permits debits - ARC, BOC, POP, RCK, TEL and XCK are debit-only applications.

Typical causes

  • Refund issued under the original debit-only SEC code (e.g. crediting back under TEL or WEB-debit semantics)
  • Credit placed in an ARC/BOC/POP/RCK batch
  • Reversal built with the wrong transaction code

What to do

Do not re-send the credit under that SEC code. If a refund is intended, originate it under an appropriate credit-capable SEC code such as PPD or CCD.

What it looks like in an ACH return

The return arrives as an Addenda Record (type 99), 94 characters wide. The return reason code sits in positions 4-6.

799R36091000010000001      09100001                                            091000019000001

Tools for this code

Decode a real status report, or check a payment file before you send it — all in your browser, nothing uploaded.

Related codes

ACH return codes: the complete reference

Source: Nacha ISO 20022 mapping guide + Federal Reserve ACH Return Reason Report + US Treasury Green Book · Last verified: 2026-07-13

Checked against: nacha.org · frbservices.org

All rejection codes