Delivery of immovable property: purchaser can obtain possession by affixing certificate and publicly proclaiming transfer. Where immovable property sold is occupied and a certificate of sale has been granted, the Tax Recovery Officer must, on the purchaser's application, order delivery by affixing a copy of the certificate in a conspicuous place on the property and proclaiming to the occupant by beat of drum or other customary mode that the defaulter's interest has been transferred to the purchaser.