ACH Return Code R24: Duplicate Entry

The R24 return code can be returned on consumer and non-consumer accounts. An ACH R24 return code indicates that the ACH entry is a duplicate of a transaction that has already been received and processed. This may occur when the same payment is accidentally submitted more than once with identical transaction details.

This return code is not restricted to a particular SEC code or account type. The Receiving Depository Financial Institution (RDFI) must return an R24 entry within 2 banking days of settlement.

The standard in finance

Slash goes above with better controls, better rewards, and better support for your business.

Get Started

What is an ACH Return Code?

An ACH return code is a standardized code used to explain why an Automated Clearing House (ACH) transaction was returned by the receiving bank.

Codes are issued by the Receiving Depository Financial Institution (RDFI) and maintained by Nacha, the organization that governs the ACH Network. Certain codes may apply to consumer accounts, non-consumer (business) accounts, or both. These codes help banks, payment processors, and originators understand what went wrong during an ACH transaction so they can determine the appropriate next steps, such as retrying the payment, correcting information, or contacting the customer.

Why you're seeing ACH Return Code R24

Code R24 means the Receiving Depository Financial Institution (RDFI) identified the ACH entry as a duplicate of a previously received transaction. This may have occurred because:

The same payment was submitted more than once. Identical transactions with matching details such as amount, date, and trace number were sent.
A retry was initiated without correcting the original issue. The payment was resubmitted even though the original entry was still pending or already processed.
System or processing errors caused duplication. A technical issue resulted in the same ACH entry being generated or transmitted multiple times.

Sending ACH Payments with Slash

You can send domestic or international ACH payments using Slash by following these steps:

Navigate to the Payments dashboard and click Transfer Funds in the top-right corner.
Select a recipient using saved contact and banking information, or add a new recipient by entering their contact and bank details.
Choose the Slash account you want to use as the payment source, select ACH Transfer as the payment method, choose the destination bank account, and enter the payment amount (in USD).
Optionally, send the recipient an email confirmation with a payment description. You can also add a memo with internal notes that are visible only to you and other Slash account administrators.
Review the recipient's bank name, account number, and ACH routing number to ensure the payment details are correct.
Once all information is confirmed, click Send Payment.

Slash offers 24/7 support by phone and email to help resolve any issues with sending payments. You can also improve how you manage ACH transfers by scheduling recurring ACH payments, receiving low-balance notifications, and tracking returned payments alongside other transactions. With Slash, you can view all account balances, ACH activity, and transfers in one centralized dashboard.

Apply in less than 10 minutes today

Join the 10,000+ businesses already using Slash.

How to resolve this return code

Follow these steps to address and prevent this ACH return.

Review your transaction history.

Confirm whether the payment was already sent or processed to avoid duplicate submissions.

Do not retry unless certain.

Only retry the transaction if you are certain it was not previously completed.

Fix system issues if applicable.

If the duplicate resulted from a system issue, correct the underlying cause before initiating another ACH transaction.