I had to deal with that situation before but I was actually the middle of three parties. (I was B of A-B-C where. A and C was not talking to each other for poli

I had to deal with that situation before but I was actually the middle of three parties. (I was B of A-B-C where. A and C was not talking to each other for political and linguistic reasons.) It was nothing but a mess, my inbox would be piled with revised document that often lost tracking, one party sending revised document based on outdated version. (And not sure which version was it.) Something I like about version control is that it at least ensures continuity of the version.