To get the benefit of sub-section (2) of Section 64 of the CPC, the objector and/or subsequent purchaser has to plead and prove that he is the bona fide purchaser,

Code of Civil Procedure, 1908; Section 64(2) and Order XXI Rule 58 - To get the benefit of sub-section (2) of Section 64 of the CPC, the objector and/or subsequent purchaser has to plead and prove that he is the bona fide purchaser, who has entered into the transaction prior to the order of attachment. (Para 4) 

Dokala Hari Babu v. Kotra Appa Rao, 2022 LiveLaw (SC) 342