If your father left an unregistered will favouring you, finding it might be tricky as the sub-registrar and L&DO won't hold copies. It's possible your father deposited the original in a sealed cover with the District Registrar for safekeeping. If you're the beneficiary, you'll need your father's death certificate and a legal heir certificate to apply for its opening. Alternatively, the will could be with a family lawyer, friends who witnessed it, or other family members.