What is the code 01 on a debit card?

Asked by: Isabell Boyle  |  Last update: July 1, 2026
Score: 4.9/5 (57 votes)

Code 01 on a debit card stands for "Refer to Issuer," which is a general decline message indicating that the issuing bank has blocked the transaction and requires the cardholder to contact them. It is a generic, soft-decline code that often suggests security issues, such as suspected fraud,, or the need for verification, rather than just insufficient funds.

What is a debit code 01?

Response Code: 01 - Refer to Issuer. The customer's card issuer has indicated there is a problem with the card number. The customer should contact their bank or the customer should use an alternate card. Sometimes this response code can also be due to a transaction being declined by Fraud Protection.

What is a bank transaction code 01?

A 01 code means that there's a problem related to the issuing bank or account. It could indicate suspected fraud, insufficient funds, or expired card details. Rather than an issue with the account itself, this means there's a problem from the merchant's end.

What is the response code 01 on a visa?

This code is a generic response suggesting that the card issuer (the bank or financial institution that issued the credit card) needs to be consulted to understand the specific reason for the decline.

What is the return code 01?

ACH Return Code R01, commonly known as "Insufficient Funds," is a standard code used in Automated Clearing House (ACH) transactions to indicate that a payment or transfer was unsuccessful due to insufficient funds in the account.

What is a billing code on a debit card?

24 related questions found

What bank sort code is 01?

Find details for the sort code 01-10-01 — assigned to National Westminster Bank PLC in Chatham, and discover Wise for your international money transfer needs.

What causes a debit card to be declined?

Your card may be declined for a number of reasons: the card has expired; you're over your credit limit; the card issuer sees suspicious activity that could be a sign of fraud; or a hotel, rental car company, or other business placed a block (or hold) on your card for its estimated total of your bill.

What is the merchant advice code 01?

01 - Updated information needed. Check Account Updater if the decline code is 79 or 82.

What are the Visa codes?

U.S. Visa Categories

  • B-1 Visa (business visitors)
  • E-1 Visa (treaty traders)
  • E-2 Visa (treaty investors)
  • H-1B Visa (temporary workers)
  • H-2B Visa (temporary non-agricultural workers)
  • I Visa (journalists, media representatives)
  • K-1 Visa (fiancé(e)s of U.S. citizens)
  • K-3 Visa (spouses of U.S. citizens)

What is the decline code on a debit card?

A decline code is an alphanumeric error code, usually two digits, that explains the reason behind a declined card transaction. These codes can come from various sources, primarily the issuing bank, payment processor, or credit card networks. Businesses may not always receive the specific decline code.

Do you include 01 in an account number?

Your Checking account number is the middle group of numbers at the bottom of a check. Be sure to include the 01 when referring to the Checking account, avoiding spaces or hyphens, so the account number is a total of ten digits.

What is a code on a debit card?

A debit card security code (CSC) is a three or four-digit number that appears on your debit card. It may also be referred to as a debit card CVV or CVC, which indicates card verification value and card verification code, respectively.

Why does my debit card keep saying card error?

If you're unsure why your debit card is declining, call your financial institution to investigate what is causing the issue. It could be an expired or damaged card, a negative balance or any of the scenarios listed above. Often, a customer support representative can help you resolve the issue quickly.

What is the validation code on a Visa debit card?

The validation code is typically a three or four-digit number that is printed on the signature strip on the back of a credit card. When using a VISA, MasterCard, or Discover credit or debit card, it is the final cluster of numbers that is printed on the back signature panel on the back of the card.

What is the transaction code 01?

Every Service User must identify a first collection and subsequent ongoing collections. Therefore every Service User must use codes: 01 – first collection.

What is card declined code 01?

This indicates an error or problem from the card issuer. The problem may be related to the cardholder's account. In general the reason for this response code may be any of the following: Suspected Fraud.

How do I look up a merchant code?

Finding Your Business's MCC Code

Merchants can contact their credit card processor or check card statements for their assigned MCC. Additionally, searching online for specific merchant category codes of a credit card issuer can help locate the MCC.

How do you fix a declined debit card?

To fix a declined debit card, first check the basics: correct card details, sufficient funds, and a valid expiration date; then, try the transaction again, but if it fails, contact your bank immediately to check for fraud blocks, ATM limits, or other security issues, as they can often unblock it after verifying your identity. 

How to test if a debit card is working?

To check if your debit card is active, try using it for a small purchase, log into your bank's mobile app or online banking to find card management settings, or call the customer service number on the back of the card. If it's a new card, you'll usually need to activate it first, often by phone or online, which also confirms its active status. 

Which bank has code 01?

The KCB Bank Code is 01.