Purchaser's title

(1) Where property is sold in execution of certificate, there shall vest in the purchaser merely the right, title and interest of the certificate-debtor at the time of the sale, even through the property itself be specified. (2) Where immovable property is sold in execution of a certificate, and such sale has become absolute, the purchaser's right, title and interest shall be deemed to have vested in him from the time when the property is sold and not from the time when the sale becomes absolute.