Ismael,

You currently have that capability via the softphone. You can add a logo, a disclaimer at the end of the comments section, etc. Here's more information regarding custom fax covers:

https://support.ringcentral.com/article/7721.html

We are a new customer sending a great many faxes through the system. We would love to be able have our Company Logo on these faxes as we have always had them on the traditional faxing.

Thank you for the reply however the link doesn't work. There are only 6 dots circling without opening a link.