When an ACH transactions does not complete correctly, an ACH return with an associated return code results. These codes explain why the transaction did not completed and can help determine whether representment is allowed or practical. Merchants may pass along costs associated with an ACH return to the customer or absorb the charge.
UniPay Gateway: Open Source Payment Gateway
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How to Own a Payment Gateway
What is a Payment Gateway
What is Recurring Billing?
How Payments Work
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