Permanent Address Legal / Illegal ?

My cousin's daughter has been with my father since she was 6 months old. His father's condition is not good so my father brought him to our house.  After finishing her studies from our house. That's why our house has all the certificates, pan, adhar, voter card address of the cousin.  She left after her marriage. But now she comes back to our house. Even then she is using our address.  Although her father's house is different. After my father's death I don't want her  to carry our address. Because that house is my father's. What should I do in…

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