You have been called into a meeting to discuss a serious problem. Your company just found out that a part of a project that a neighbor is actively...

You have been called into a meeting to discuss a serious problem. Your company just found out that a part of a project that a neighbor is actively constructing may be on your company's property. They have started doing site work clearing and excavating. Of course the neighbor denies that so litigation is a real possibility. Your boss looks at you and says "what should we do and what legal considerations do we need to keep in mind?" What do you tell your boss?