I blame the lack of good open source tools for creating and verifying signed PDF (or an alternative format). Faxes are deeply misunderstood, I still occasional

I blame the lack of good open source tools for creating and verifying signed PDF (or an alternative format). Faxes are deeply misunderstood, I still occasionally have vendors and clients say "we need an original" or "we need a signature" or some other brain damaging excuse. And these aren't companies in the sticks that don't know it's 2018, these are large (legacy) companies in big cities.