Land document

Dear sir, i had purchased a land during 1987 from a known person which was owned by her. but the back document for this deed says that this property was acquired by one of the sisters by paying certain amount to other two sisters through a mediators arrangement. this property belongs to their mother after the expiry of her father. The issue is there was one brother for these sisters who went missing for more than 30 years and in spite of any amount of efforts he is not traceable or he did not come back. This detail is recorded in the sale deed, Hence this property was taken possession by these sisters. Now iam keen to sale House constructed in ths land i.e in year 2015 .s far me concerned i have given my sale deed plus the previous one in which this missing persons details is written. i have been issued possession certificate also and kriyapthiram in kerala , Palakkad (by land tribunal ) where my property is located.now please let me know whether my selling of property will have any legal roblems due to the missing person ( now his missing is about 60 yrs) and already 2 buying transactions are over during this period. Kindly clarify. Rajendran