How to transfer / register POA property if POA holder has passed away

Since there is no clarity to your question,

To give you a perfect legal advise, we would like to know a few more things :

1. who is in the current possession of the property?

2. Did your father made any Will or died intestate(without drawing up any Will)?

If your father passed away without any Will, property cannot be registered it can only be mutated i.e. divided among all the legal heirs.

Assuming that you are Hindus, your father's property if he died intestate property will be divided as per The Hindu Succession Act.

Now regarding your query, after the father's death, property could only be mutated and there is no law to provide for registry of property in your name.