Rule 61
(1) Where property is sold in execution of a certificate, there shall vest in the purchaser merely the right, title and interest of the defaulter at the time of the sale, even though the property itself is 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 when the property is sold, and not from the time when the sale becomes absolute.