Islamic sharia - ancestral property dispute

Please indicate whether it relates to Shia or Sunni sect.

When did your grand father die?  Who were all alive when died (i.e. his son(s) and daughter(s), wife, mother/father etc.)

When did your uncle sell the properties?  When did you file the court case?

Upon knowing this, your query can be answered.

Thanks for quick response. We belong to Sunnu Sect. My grandfather died in 1973 and that time his wife, 7 daughters and 2 sons (my father is one among) were alive. Later in 1983 my grandmother died and soon after that i.e. in 1984 without anyones knowledge he changed property in his name with the help of local authorities (with his money power as he was govt employee) and sold part in1993 (we have collected all the documents from 1960 for this property) and remaining in 2005. My father was cardiac patient since 2001 and got expired in 2010. Later we started digging the details and end up in finding all the mishandling of the property.

Please advice...