Specific Performance Against Good-Faith Purchaser with Notice of Prior Sale

A dispute arose over the validity of a contract for the sale of a building lot, where the seller subsequently sold the same property to a third party who was aware of the initial agreement. The initial buyer sued for nullification of the second sale and specific performance of the first contract. The court held that the second purchaser, despite having registered their title first, could not benefit from this registration because they acted in bad faith, having knowledge of the prior, unregistered sale agreement; thus, the first buyer's right to specific performance against the seller remained enforceable against the subsequent purchaser, leading to the cassation of any judgment upholding the second sale against the first buyer's claim.