Fax - suppress the header on transmissions to not list the sender's full name!

Just like with the RingCentral Phone function, where the user can choose how their Caller ID shows up (as their actual number, or as the company's number, or as "Blocked"), it would be useful to have that option in the Fax functionality. Currently, even if the Custom or Blank (or None) Cover Letter option is used, the header still lists the full (first and last) name of the registered user for that number (example attached) :-(