I paid $10 to send a 28 page fax. I absolutely believe utility and govt companies still use fax because they want to make somethings very hard for the average customer. There's no reason why I shouldn't be able to send an email a pdf to show good credit so they don't charge me a deposit fee.
Twilio please build a mobile app so those of us who don't live with typewriters and fax machines can deal with our nasty govt.