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Website Modification Reference


This section describes how to modify your website to integrate Payer Authentication services into your checkout process. It also provides links to payment card company websites where you can download the appropriate logos.

Website Modification Checklist

Modify these web page buttons:

  • Order submission button: Disable the final "buy" button until the customer completes all payment and authentication requirements.
  • Browser back button: Plan for unexpected customer behavior. Check throughout the authentication process so you do not authenticate transactions twice. Avoid confusing messages, such as warnings about expired pages.

Add appropriate logos:

  • Download the appropriate logos of the cards that you support. Place these logos next to the order submission area of your website.
  • Add a message next to the final "buy" button and the card logo to inform your customers that they might be prompted to provide their authentication password.

EMV 3-D Secure Service Logos

This table contains links to payment card company websites from which you can download 3-D Secure logos.

EMV 3-D Secure ServiceDownload Location
Visa Securehttps://usa.visa.com/run-your-business/small-business-tools/payment-technology/visa-secure.html — links to logos for download; also includes a best practice guide and Merchant Toolkit.
Mastercard Identity Check and Maestrohttps://brand.mastercard.com/brandcenter.html
American Express SafeKeyhttps://network.americanexpress.com/uk/en/safekey/ — links to logos for download.
Diners Club ProtectBuyhttps://www.dinersclubus.com/home/customer-service — Contact Diners Club customer service for assistance.
Elo Compra SeguraContact Elo customer support to obtain logos.
China UnionPayContact China UnionPay customer support to obtain logos.

Informational Message Examples

Add a brief message next to the final buy button on your checkout page to inform customers that they might be prompted for their authentication password or to enroll in the authentication program for their card.

These examples might be used, but consult your specific card authentication program to confirm they conform to your card authentication program's messaging requirements.

Example 1:

To help prevent unauthorized use of <card_type> cards online, <your_business_name> participates in <card_authentication_program>. When you submit your order, you might receive a <card_authentication_program> message from your <card_type> card issuer. If your card or issuer does not participate in the program, you are returned to our secure checkout to complete your order. Please wait while the transaction is processed. Do not click the Back button or close the browser window.

Example 2:

Your card might be eligible for Visa Secure, Mastercard, Diners Club ProtectBuy, or Discover ProtectBuy programs. After you submit your order, your card issuer might prompt you to authenticate yourself. This authentication can be done through a one-time pass code sent to your phone or email, by biometrics, or some other form of authentication.

Last published: September 29, 2026