BSD BLACKMAIL! Real life story from the Talmud. A lender attempted to blackmail a borrower into selling him the field that was mortgaged to him (which he possessed already for three years). The potential victim acted smart and gave the field in question to his little son (a minor) as a gift. Later on he “sold” the field to the blackmailer, through a shtar, and with achrayus (warranty) written in the shtar.
Now the aggressor became the victim, claiming that he gave money to the “seller” for a sale that was fake, and he wants his money back. He is right.
Now, although he should get his money, can he claim it from “nechasim meshuabadim” i.e. property that was sold later on by the “seller” or not?
The general rule in such cases is that only a warranty (achrayus) allows a person to claim from meshuabadim.
The core of the question in our shiur is regarding the validity of the warranty written in the shtar. Is the warranty written in the shtar valid, although the actual sale was all fake?