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  2. To update your registered Costco.com email address simply: Visit the Costco.com home page and select Sign In / Register (located in the upper right-hand corner). Sign in using the existing email address and password. Visit Account Details in your Account.

    • Account Details

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  3. Enter the verification code sent to your email address, then select Verify Code. Enter your new email address, then select Update . Use your new email address the next time you sign in at Costco.com.

  4. Or you can email us at: customercare@costco.co.uk. Or write to us at Customer Care, Costco Online UK Ltd., UK Home Office, Hartspring Lane, Watford, WD25 8JS, United Kingdom. Or fax us at: +44(0)1923 257186. Please include your name, address, item number or order confirmation, purchase date, model number and manufacturer’s name (if known).

  5. How can I renew my membership online? Renewing your membership online is as simple as signing in, heading to " My Account ," and selecting "Renew Membership." Please keep in mind that active memberships can only be renewed 90 days...

  6. Sign In. Email Address. visibility. Password. Forgot Password? Keep me signed in. Check this box only when on a private device. Sign In. New to Costco?

  7. Enter your current email address and select Send Verification Code. Enter the verification code sent to your email address, then select Verify Code. Enter your new email address, then select Update. Use your new email address the next time you sign in at Costco.com. To change your password: Follow these steps to update your password.

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