possession and enjoyment of the suit properties. Prior to that, the first defendant (appellant herein) had fraudulently obtained patta in his name in respect of the suit properties. Therefore, Chinnammal filed a petition before the Sub Collector, Chengalpattu, for cancellation of patta issued in favour of the first defendant. After conducting an enquiry, the Sub Collector, Chengalpattu, vide his orders dated 06.01.1988 (Ex.A4), cancelled the patta issued in favour of the first defendant (appellant herein) and patta was issued in favour of Chinnammal. Thereafter, the first defendant preferred an appeal before the District Revenue Officer, Chengalpattu. The District Revenue Officer, Chengalpattu confirmed the orders passed by the Sub Collector, Chengalpattu, vide his proceedings dated 03.08.1995 (Ex.A10). The appellant herein did not prefer any revision before the Commissioner of Board of Revenue and therefore, the orders passed by the District Revenue Officer, Chengalpattu, has become final. However, the first defendant colluded with his co-brother, the second defendant (second respondent in the present appeal) and executed a mortgage deed in his favour, in respect of the suit properties. This mortgage deed was executed only after the disposal of the appeal by