An authorized user is an additional user who can make charges on your account but doesn’t have financial responsibility for the account. You can ask to add an authorized user at no extra charge when you apply for the card or after your account is opened. To add an authorized user on a Capital One Costco Mastercard, your authorized user must also be a Costco member.
To add an authorized user:
- Sign in to online banking. Don’t have an account? Sign up now.
- Select View Account for the account where you’d like to add an authorized user.
- Select More Account Services from the taskbar.
- In the window that appears, select Add an authorized user.
To add or remove an authorized user, you can click on More Account Services and select Manage authorized users.