IAT Entry Coding Error
Category: International (IAT) Initiated by: Gateway / RDFI
Applies to (SEC scope)
OUTBOUND IAT
camt.053 mapping
AG02 — Invalid Bank Operation Code
Reinitiation
Restricted — permitted only within the Rules’ limits
Nacha's definition
The IAT Entry is being returned due to one or more of the following conditions: ▪ Invalid DFI / Bank Branch Country Code ▪ Invalid DFI / Bank Identification Number Qualifier ▪ Invalid Foreign Exchange Indicator ▪ Invalid ISO Originating Currency Code ▪ Invalid ISO Destination Currency Code ▪ Invalid ISO Destination Country Code ▪ Invalid Transaction Type Code
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: OUTBOUND IAT.
How it appears in an ISO 20022 statement
Nacha's mapping guide maps R80 to camt.053 reason code AG02 (Invalid Bank Operation Code) — ISO definition: Bank Operation code specified in the message is not valid for receiver.
Return time frame
IAT and Gateway returns run to the time frames in the Nacha Operating Rules, which are not stated in the public sources used here.
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.
correct the field the RDFI identified, and code the resubmission correctly.
What an operator does next
The IAT entry failed coding validation on one of the listed fields. Fix the IAT addenda coding.
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
- Federal Reserve Financial Services — FedGlobal ACH Payments Origination Manual, 3 August 2026 (return item code tables) — ach-operator-manual, retrieved 2026-09-06