Short Sale Realtor http://www.ShortSaleSettlements.com
Are you talking about paying additional to insure against overages or shortages in property lines.
If the is a neighborhood where people have been putting up their own detached structures, attached additions, adding drives, fences and so forth it is probably worth it.
We recently went out on a REO where a relative owned the property next door, therefore no one worried about where they built anything. It was all in the family right? Well that was okay as long as the family owned both pieces of property. Now the one family member did not make payments, the property was forclosed on and another party picked it up for a song and a dance. They also picked up the neighbors driveway, well house and half of their pool. LOL.
Yes I would get the extra title insurance