Remove fax number from top of fax pages

We use our Ring Central account to allow our customers to send faxes directly out of their account on our platform. Frequently, the material they send out contains a request for a response via fax, to a number they include in their letter. However, the recipients frequently send their responses to our fax number rather than that of our customers because they see our fax number at the top of each page. If this could be removed, that would be very helpful.