Comment by QuercusMax

When we were buying a house back in 2009 (before electronic document signatures, which are the most amazing thing ever compared with the old way) we had to sign zillions of different pieces of paperwork going back and forth while making offers and so on. I was doing most of this during the day from the office, and all the paperwork had to be signed by both me and my wife.

So what I'd do was take the PDF, paste in my wife's signature, print it out, sign it myself, then fax it over. Never had any problems.