It's pretty much word of mouth for me atleast. But, I have ran into problems in the woods before. The owner's son of one property I hunted gave me permission to hunt. Well, his dad also gave permission to a guy. Neither one of us knew that there was another person hunting. So, one day I shot a little seven pointer and was dragging it out, just so happens I came across the guy on a trail...
Let me tell you it wasn't pretty, words were exchanged and so forth. He insisted that he was the only one who had permission to hunt there. He also didn't like the fact that I killed "his deer" and wanted to take my deer from me. After I set my bow down, took my jacket off and got in his face, he took off. I think it all could have been avoided if we had signed pieces of paper for sure. For people that don't know me too well, but let me hunt on there land, we usually write something up for insurance purposes...