I would inquire if my neighbours have the right under property law to attach the post of their front fence to a privacy wall inside our property without even informing us? When we informed them in writing that the wall where they attached their post is not a boundary fence, but a structure for the purpose of privacy. They arrogantly answered that they have a right to do so as the wall is considered a boundary fence. We informed them that the wall is for a privacy screen. That's the reason it is built inside our property. According to them, it is considered a boundary fence and whatever we say, their attachment will stay and we can take the matter to any court or tribunal. Your help is truly appreciated as we have to know if we are on the right side of the law and if we have to take this matter further.