If a transaction occurs for no consideration e.g. a gift, then there is always a chance for a progenitor to sue and claim rights as the transaction “never happened”. This happens when a company acquires another and tries to strip benefits, so the company fires and rehires all employees so that is the consideration. I have personally reviewed hundreds of land sales for 10$ in Texas so there is legally binding consideration exchanged. Functionally it is a legally bulletproof gift.