[GFischer]

There are some interesting legal barriers to overcome in some of those cases.

In my country, faxes are legally recognized as evidence, but email isn't, so there's a strong incentive to fax documents.

A law recognizing electronic signatures might help things, but it's still pretty cumbersome.

I tried to build a solution for "escribanos" - the U.S. approximate equivalent is notaries, but they're specialized lawyers actually - and the legal hurdles proved impossible to overcome.

Stuff that is being done with fax machines out of ignorance would be a better place to start, but there you have to face conservatism (an admittedly easier barrier than legal obstacles).