I made the owner of a my neighbouring vacant block aware that I wished to construct a first fence next to my new home. He asked me to get quotes. I later informed him the cost to him would be about $1000 ( cheapest of three quotes ) He said Ok. He attended on the day the fence was built and measured the boundary. We had previously agreed on an end point at the property fronts. He even got the fencer to put a couple of pailings on his rear fence where they were missing. I made thr mistake of not getting him to sign the builders agreement document for 50%, Now he has decided he doesn't want to pay because he didn't sign and says he doesn't have to pay his share. I have since paid the fencer the total amount out of fairness to him. Am I shot or is my neighbour still liable for his share? Can I put a covernant on the vacant block for the unpaid amount? Thank you.