Well it may well be a con, but unfortunately in this life you have to be a bit streetwise, and to put someone on the title of your house when they had only given you 30k regardless of the situation re his father, you would have thought would have rung alarm bells. So, although it is very worrying and I do feel for your friend, he may well find himself in trouble here as they are, I presume joint tenants of the property. Whether he could have a legal right to show that there was some subterfuge or intent to defraud I don't know but I think it is pretty unlikely.