1490. When a litigious right is sold, he or she against whom it is claimed is wholly discharged by paying to the buyer the price and incidental expenses of the sale, with interest on the price from the day that the buyer has paid it.
1491. A right is held to be litigious when it is uncertain, and disputed or disputable by the debtor, whether an action for its recovery is actually pending or is likely to become necessary.
1492. The provisions contained in article 1490 do not apply:
1. When the sale has been made to a coheir or co-proprietor of the right sold;
2. When it has been made to a creditor in payment of what is due to him or her;
3. When it has been made to the possessor of a property subject to the litigious right;
4. When the judgment of a Court has been rendered affirming the right, or when it has been made clear by evidence and is ready for judgment.