Hi ruojun22,
I can certainly understand your concern. If you've been notified that an email address has been added to your account without your permission, I recommend logging into your account at your earliest convenience and changing your account's password and security questions by following the steps listed here. You will also want to review your recent activity to determine whether or not payments were sent without your permission. If unauthorized payments were sent, you can report them to us by following these steps. Once reported, our teams will review your report and provide you with updates via email/Secure Message Center.
I hope you find this information helpful!
-AshleyP
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