How can I verify my membership online?

Membership verification is NOT required to purchase Member Only Items on


Looking for help completing the one-time online verification process? Follow the step by step instructions below:

  1. After signing in or registering on, click the Verify Membership link on your Account Details page to begin the one-time verification process.
  2. Enter your Membership number.
  3. Enter your first name, last name, and zip code.
  4. Answer public record questions to verify your membership.*
  5. After correctly answering security questions, you'll be able to view and edit all features associated with your membership.

Unable to Successfully Verify Your Account?

Please complete the following steps:

  1. Visit your local Costco warehouse or contact us.
  2. Provide your membership card and photo ID to a Membership Clerk, who will send an email containing a link valid for 48 hours.
  3. Upon receipt of your email, follow the steps provided to create a new password and access your membership account.

*Questions used to confirm your identity and allow you to access your membership information online are provided by a third-party public records service. Costco does not have access to the questions or your answers, and Costco only receives a Pass or Fail notification from the third-party service. This process is necessary for the security and privacy of your personal information.

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