So our long time neighbors, we'll call them the 'Smiths' (not their name), have been dumping bags of garbage behind their fence onto our property that is a thin strip of land behind our garage. I went out there today and picked up 2 large garbage bags and 8-10 Walmart like bags filled with garbage. It has to be them, it's a secluded area that only we or they would really ever go near. Last spring I spent a bunch of time cleaning that area up of their garbage and I don't want to have to do it again, so I put all the garbage into their can and left them this note taped to their garbage can. In retrospect, I should have photographed the garbage too, oh well. I'm hoping it does the trick.