What Does Do Not Honor Mean Credit Card

Complete Explanation

The phrase “Do Not Honor” is an authorization response code used in credit card payment processing. When a merchant submits a transaction for approval, the card issuer (the bank that issued the card) returns this code to indicate that the transaction should not be approved at that time. It is not a definitive rejection of the card itself, but a refusal to authorize the specific transaction.

• Definition:
  An electronic message from the card-issuing bank to the merchant’s payment processor stating that the transaction cannot be completed as requested.
• Common Causes:
  Reasons include suspected fraudulent activity, insufficient available credit or funds, the card being reported lost or stolen, temporary account holds, or the transaction exceeding the card’s daily limit.
• Merchant Response:
  When merchants see this code, they typically inform the customer and may ask for an alternative payment method. Some merchants may retry the transaction after a short period, but repeated attempts can trigger fraud alerts.
• Cardholder Action:
  The cardholder should contact their issuing bank to determine the specific reason and resolve any underlying issues, such as clearing a fraud alert or adjusting spending limits.

History / Background

Credit card authorization systems originated in the mid-20th century with manual phone verifications. As electronic payment networks like Visa and Mastercard evolved in the 1970s and 1980s, standardized response codes were developed to streamline communication between merchants, acquirers, and issuers. “Do Not Honor” (often code 05 in ISO 8583 messaging) became one of the standard decline codes. Its use has expanded across global payment networks, and it remains a common response when an issuer chooses not to authorize a transaction for reasons that may not be immediately disclosed to the merchant.

Importance and Impact

The “Do Not Honor” code plays a critical role in payment security and risk management. It helps prevent unauthorized transactions while giving issuers flexibility to decline suspicious activity without permanently blocking the card. For merchants, encountering this code can lead to lost sales, customer frustration, and additional processing costs if they need to retry or handle disputes. For consumers, it can be an inconvenience but also a safeguard against fraud. The code’s ambiguity (the merchant does not know the exact reason) can create friction in customer service interactions.

Why It Matters

Understanding “Do Not Honor” is practically relevant for anyone who uses credit cards or processes payments. For cardholders, knowing that the code does not mean the card is broken helps reduce anxiety when a transaction is declined. For merchants and business owners, recognizing this response can inform best practices—such as not retrying the same transaction immediately and instead advising the customer to call their bank. This knowledge can improve customer experience and reduce unnecessary declines.

Common Misconceptions