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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 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:

  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. Please try logging in again ensuring that you have entered your email and password correctly. If you do not have a password that would mean you do not have an online account. If you don't have an online account, please register for an online account.

  6. 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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  8. Mar 24, 2024 · Need to update your email address on Costco? It's a straightforward process. Follow these easy steps to change your email associated with your Costco account...

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