You can use one of the backup codes that should have been downloaded to the device used when 2FA was enabled to regain access to your account.
If you lost these codes, contact firstname.lastname@example.org from the email address associated with your merchant account and ask us to disable 2-Factor Authentication. For security purposes, we will complete an identity verification process before we remove 2FA from your account. You will then be able to log back into your account and re-enable 2FA.
To enable 2FA on a new device for your BitPay merchant account, please visit the following link: