Great question about a legislative solution to the Beauperthuy issue. That is exactly what the Dutch did after their Supreme Court refused to eliminate the claims of the heirs of the Texas Beauperthuys. Let me add a little piece to the insanity of this case. Under the law of most English based jurisdictions (like the US, Canada etc), the law of adverse possession eventually may change the ownership of land. It does so because the statute of limitations for bringing an action in ejectment is measured in a limited number of years (10 in some states, 21 in PA and others). After this time you simply cannot evict someone who is open, notorious, hostile, exclusive, continuous possession of your land. France has something similar, but it does not apply to people who lost possession by fraud. The Beauperthuy heirs claim their ancestor was defrauded out of his share of the estate because he was in the Republic of Texas.