Field Error(s)

Nacha's definition

One or more of the field requirements are incorrect.

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: ALL, EXCEPT IAT.

How it appears in an ISO 20022 statement

Dishonored returns are exchanged between the ODFI and RDFI and, per Nacha's mapping guide, are invalid entries for camt.053: they must be sent in Nacha file format (footnote 2). There is no camt.053 mapping.

Return time frame

Dishonored and contested dishonored returns are exchanged between the ODFI and RDFI under their own time frames in the Nacha Operating Rules. Nacha's mapping guide notes they must be sent in Nacha file format rather than through camt.053. The time frames are not stated in the public sources used here.

Source: 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)

What an operator does next

The RDFI's return had field errors; the ODFI dishonors it. The Green Book lists the two-digit sub-codes that identify which field.

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) — retrieved 2026-09-06
• Nacha — rule page 'ACH Network Risk and Enforcement Topics' (unauthorized return rate threshold; reinitiation of entries) — retrieved 2026-09-06
• US Treasury, Bureau of the Fiscal Service — Green Book, Chapter 4: Returns (return reason codes for federal ACH credits; dishonored return codes) — retrieved 2026-09-06