Section 137(6) in The Delhi Co-operative Societies Rules, 2007
(6)The certificate of sale state the property sold and the name of the purchaser and it shall be conclusive evidence of the fact of the purchase in all courts and tribunals, where it may be necessary to prove it and no proof of the seal or signature of the Recovery Officer shall be necessary unless the authority before whom it is produced shall have reason to doubt its genuineness.
