In any deed or declaration for the purpose of either a sale of immovable property, or a transfer of a business or the right to a lease or the benefit of a promise to lease relating to all or part of an immovable property, or an exchange or division involving immovable property or a business, the sellers, purchasers, exchangers, co-sharers, their legal guardians or administrators are required to end the deed or declaration with a statement worded as follows: “The parties affirm, under the penalties enacted by Article 1837 of the General Tax Code that the present deed (or declaration) expresses the full amount of the agreed price or balance”.