- As per the registration Act, an unregistered gift deed having not value in the eye of law.
- Further , in the absence of any legal transfer documents you sister cannot claim ownership of any portion of the property which was given to her by your father.
- Further , patta is a legal document issued by the Tehsildar , and the person who holding a registered government patta is also termed as pattadar if related to land.
- Since both names are in Patta , then you can apply for rectifying the patta after submitting an application for the same and to entered the shares of both .
- If the papers are with sister , then you can apply for getting the same from the respective office of tehsildar.
- Further she cannot claim the share as per her wish , and you can file a suit for getting your share in the property.
- Since, you are residing abroad , then you can give POA to any relative or nearest one to approach the court and to engage a lawyer on your behalf.
- If she is receiving rent , then you can move an application with the said suit before the court for depositing or sharing the rent .
- As per Hindu law, she can claim equal share in the property .