What is the name of your state? I live in WILL COUNTY ILLINOIS. We build and lived here since 1993. We have 2.5 acres. Our neighbor moved in shortly after us. Unknown to us at that time her fence, approx. 2ft. in width and 200ft. in length was and still is on our property. In 2001 we had our property SURVEY and found that our neighbors fence was on our property and brougth it to her attention, she stated she needed some time to take it down and move it .As of now she has yet to do so. she now refuses to move the fence telling me that the fence is GRANDFATHER-IN, and if I attemp to remove it she would call Police and have me arrested. I have been paying taxes on this property since we moved here. Please, can you tell me what the LAW is on this matter. THANK YOU!!