Invalid DFI Account Number

Nacha's definition

The Receiver's account number included in Field 3 of the Addenda must include at least one alphameric character.

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: ENR.

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

ENR returns are made by a Federal Government Agency under the Rules' ENR provisions; the time frame is 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)

Can the entry be reinitiated?

Nacha's reinitiation rule page allows reinitiation "to correct administrative errors", with fields other than Company Name, Company ID and Amount modified only to the extent necessary. A corrected resubmission of a returned debit is therefore treated as a reinitiation, within the Rules' limits and carrying RETRY PYMT. Nacha's reinitiation rule addresses returned debits; a returned credit falls outside it.

Source: Nacha — rule page 'ACH Network Risk and Enforcement Topics' (unauthorized return rate threshold; reinitiation of entries)

What an operator does next

ENR (automated enrolment) entries are returned by a federal agency for the enrolment data problem the code names. Correct the enrolment record field identified and resubmit the enrolment; these codes do not arise in commercial billing.

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 'ACH Network Risk and Enforcement Topics' (unauthorized return rate threshold; reinitiation of entries) — nacha-rule-page, retrieved 2026-09-06