Letter of administration of joint property

Hello, 

Your brother's son can take legal heirship certificate from court for the share of brother's property. 

Your brothers' son is entitled to share of his share of property with a letter of administration. Letter of Administration is granted to the beneficiaries after they apply to a Court of law having competent jurisdiction. Letter of Administration entitles the administrator to all rights belonging to the intestate as effectually as if the administration had been granted at the moment after his death

In the absence of  Will and property left intestate, what is required is a Legal Heir Certificate, not Letter of Administration.

It is joint Property and no partition is done.

So still can I ask for letter of Administration only for my or my father's part of property

If yes how?

Is it just ok to mention that property is joint property and j just want letter of Administration for my part?

It is Property of CIDCO, so they ask letter of Administration olny