My grandfather bought land from DLF 40 years ago and died with a will, which was inherited by his wife (my grandmother). My grandmother died without a will, leaving 5 heirs (3 sons and 2 daughters. House was built on the land mostly by 2 sons, of which one has full possession till date. one daughter and one son are deceased. Daughter's one-fifth share was inherited by her husband, son and daughter. Apart from this grand-daughter, everyone has given a registered relinquishment deed to the son, who has possession. Now he doesnt want to sell house nor pay share to anyone. he is also troubling the granddaughter to sign relinquishment deed so that he can have entire property to himself and his own daughters. I am grand-daughter's brother, and I have also signed relinquishment 20 years ago in good faith. But now I want to have relinquishment cancelled and also want my sister to get her proper share. Please suggest possible solutions. Would be grateful.