My aunt pressurised my grandfather to write a piece of land on her name and after 2 years he do that and died.then, cAn I file case on it.

In India, if someone influences or coerces another person to transfer property in their favor through fraud, undue influence, coercion, or misrepresentation, it can be considered as a case of fraud or undue influence under the Indian Contract Act, 1872.

You may explore legal options to challenge the transfer of the land to your aunt by filing a case under the Indian Succession Act, 1925, or the Indian Contract Act, 1872 based on the circumstances of the case and the evidence available to prove that your aunt coerced or pressurized your grandfather into transferring the land to her.

It is advisable to consult with a lawyer who specializes in property and inheritance laws to assess the specific details of your case and determine the appropriate legal course of action.