To add a cover page, you'll want to start from the normal Send a fax window you see when you log in to our site. Upload the document you want to send, make the necessary edits and/or sign your document, and then enter your recipient's fax number.
Once that number has been entered, you'll notice the checkbox next to Add a cover page under the Include any other items? section.
Checking the check box next to Add a cover page will expand to where you can enter your recipient's name, your name, and a short message. Click Save to add these inputs to your fax as a cover page.