I am sponsoring my parents they have properties

I am sponsoring my parents they have properties but on my mother name and it is different in passport. it is arround 1,50,10,000. what can we do…and only letter of properties and business by Chartered Accounted is enough.how can i change name in all documents… how can i notarized all original documents… photo copies of all documents is needed.

What’s different in the passport? They can show their IT returns to list their assets in the home country.