How can I change the proof of Payment email address

You can change the e-mail address displayed on the order confirmation page when the buyer has selected a manual wire transfer payment method by changing the configured e-mail address in the OrderCentral System Settings.

1. Go to the Setup page.
2. In the Quick Find search for Custom Settings.
3. In Custom Settings click the Manage link before OrderCentral System Settings.
4. Configure the correct e-mail address in the Order Email field. 
5. Click Save.