daughters. However, after the death ofher father-in-larv, all the petitioners herein, taking advantage of mental illness of the husband of the de ./'acto complainant, took him to their house and by suppressing that he was having wife and children, have filed a suit for partition in o.S.No.60g of 2012 on the file of I Additional District Judge, Ranga Reddy District. A preliminary decree was passed in the said suit by judgrnent, dated 06.12.2012 basing on the collusive compromise without thc knowledge of Lhe de facto complainant. Basing on such collusive decrec, a registered partition deed was executed on 20.12.2014. On coming to know of the decree in the aforesaid suit, the de facto complainant herein got filed O.S.No. l6 of 2019 before the XIII Additional District Judge, Ranga Reddy District at L.B.Nagar seeking to declare the said preliminary decree as well as the consequential final decree as null, void, fraudulent, etc. The copy of plaint in O.S.No.16 of 2019 is placed on record.