Improper Source Document / Source Document Presented for Payment
Category: Check conversion & RCK Initiated by: RDFI
Applies to (SEC scope)
ARC, BOC, POP
camt.053 mapping
Not mapped
Reinitiation
Not applicable to this code
Nacha's definition
RDFI determines that: (1) the source document used for an ARC, BOC, or POP Entry to its Receiver's account is improper, or (2) an ARC, BOC, or POP Entry and the source document to which the Entry relates have been presented for payment and posted to the Receiver's account.
Verbatim from Nacha — ISO 20022 Guide to Mapping U.S. ACH Return Items and Notifications of Change, August 2023, Version 2.01 (Table 1, return reason codes) (return reason code table). Applies to: ARC, BOC, POP.
How it appears in an ISO 20022 statement
Nacha's mapping guide marks this code as not currently supported or mapped for camt.053 (footnote 1): it applies to Standard Entry Class codes or flows the guide does not cover, so it has no published ISO 20022 reason-code mapping.
Return time frame
Nacha's R10/R11 rule page describes R39 as a 2-day return, in contrast with R37's 60-day extended return.
Can the entry be reinitiated?
Nacha's reinitiation rule governs resubmission of returned debit entries; it does not arise for this code. See the definition and the operator note for what the return means and who acts on it.
What an operator does next
The source document was ineligible, or both the entry and the check were presented. Refund any second payment; review eligibility screening for check conversion.
PaymentBrief guidance, not Nacha text. Your ODFI's procedures and the current Nacha Operating Rules govern.
Where this comes up on PaymentBrief
Sources for this code
- Nacha — ISO 20022 Guide to Mapping U.S. ACH Return Items and Notifications of Change, August 2023, Version 2.01 (Table 1, return reason codes) — nacha-mapping-guide, retrieved 2026-09-06
- Nacha — rule page 'Differentiating Unauthorized Return Reasons' (R10 / R11; effective 1 April 2020 and 1 April 2021) — nacha-rule-page, retrieved 2026-09-06
- Nacha — rule page 'ACH Network Risk and Enforcement Topics' (unauthorized return rate threshold; reinitiation of entries) — nacha-rule-page, retrieved 2026-09-06