ACH Return Guide

A Practical Resource for Straddle Accounts

Quick Reference: What You Need to Know

What is an ACH Return?

An ACH return is a notification that funds couldn't be collected from (or deposited into) a customer's bank account. Think of it like a declined transaction - sometimes it's avoidable, sometimes it's not. The key is understanding why it happened and what to do next.

Returns come from:

🏦 RDFI (Your Customer's bank) - Most common, within 2 banking days
🏦 ODFI (Your bank) - Less common, within 60 days
⚙️ ACH Operator - Rare

When Can Returns Occur?

Standard Administrative Returns

2 banking days - Most administrative returns (R02, R03, R04)

Insufficient Funds

2 banking days - R01, R09 typically returned quickly

Unauthorized Returns

Up to 60 days - R05, R07, R10, R51
2 days- R29
Much longer window because customers may not notice immediately

Why Returns Matter

Nacha requires all accounts to maintain ACH debit return rates below these thresholds (calculated over the preceding 60 days):

Threshold Type	Limit	Return Codes Included	What It Means
Administrative	< 3%	R02, R03, R04	Account issues (closed, invalid, doesn't exist)
Unauthorized	< 0.5%	R05, R07, R10, R29, R51	Authorization problems or disputes
Overall	< 15%	All codes (including R01, R09)	Total return rate including NSF

⚠️ Exceeding these thresholds will impact your account status and processing capabilities. Straddle will reach out to accounts when they are ~50% of the thresholds to suggest mitigation solutions.

Common Return Codes: At a Glance

Administrative Returns (Fix Account Information)

Code	Reason	What Happened	Action Required
R02	Account Closed	Previously active account is now closed	Stop - Contact customer for new account
R03	No Account	Account number doesn't match any open account	Stop - Verify correct account details
R04	Invalid Account Number	Account number structure is invalid	Stop - Correct account number structure

Insufficient Funds (May Retry)

Code	Reason	What Happened	Action Required
R01	Insufficient Funds	Available balance too low	May retry within 180 days per Nacha
R09	Uncollected Funds	Ledger balance exists, but uncollected items reduce available balance	May retry within 180 days per Nacha

Unauthorized Returns (Critical - Address Immediately)

Code	Reason	What Happened	Action Required
R05	Unauthorized - Corporate SEC on Consumer Account	Corporate SEC code (CCD) used on consumer account without authorization	Stop immediately - Review SEC code usage
R07	Authorization Revoked	Customer claims they revoked authorization	Stop - Obtain new authorization; review original authorization terms
R10	Customer Not Authorized	Customer states they don't know you or never authorized the debit	Stop - Review authorization documentation
R11	Entry Not Per Authorization Terms	Authorization exists but payment details incorrect (amount, date, frequency)	May correct within 60 days of R11 return date without new authorization
R29	Corporate Not Authorized	Corporate customer states specific entry wasn't authorized	Stop - Likely due to automatic debit block due to corporate account. Must add Straddle's ACH Company ID before resubmit. Contact Straddle Compliance.

⚠️ Critical: These returns indicate authorization problems. Review your authorization documentation immediately and contact the customer before attempting any further transactions. Contact Straddle to unblock paykeys.

Payment Management

Code	Reason	What Happened	Action Required
R08	Payment Stopped	Customer requested stop payment on this specific debit	Contact customer to understand reason; obtain new authorization before retry
R23	Credit Refused	Customer declined credit (wrong amount, overpayment, doesn't recognize originator)	Obtain authorization before resending credit
R24	Duplicate Entry	Entry matches another transaction (trace number, date, amount)	Accept return if duplicate; investigate if not

Special Circumstances

Code	Reason	What Happened	Action Required
R16	Account Frozen / OFAC	Account restricted by RDFI or legal action; may involve OFAC	Stop - Review authorization terms; OFAC may have flagged payment
R17	File Error / Questionable	RDFI can't process due to errors OR suspects fraud	Check Addenda field for details; if "QUESTIONABLE," investigate transaction validity
R20	Non-Transaction Account	Account type doesn't allow ACH transactions	Stop - Contact customer for transaction-enabled account