You can only add a Credit One Platinum authorized user online.
To start, sign in to your account at https://www.creditonebank.com/. Select “Settings” in the site menu -- if an authorized user can be added to your account, you will see an “Authorized User” section displayed on the page, where you can add them.
Adding an authorized user has its pros and cons, so make sure you check out WalletHub’s overview here.
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