Domocile (residencial certificate) of three states

There is only one domicile in India wherever you are. Threre is no such domicle as domicile of  Delhi or Nagaland or Pune etc.

Sir, Its about state level domocile certifiacte, the home state/district he/she belongs to, for being elligible in any competitive exams for reservation or fee concession etc...

Get a domicile certificate where you reside permanently. 

Sorry sir, my question is different than what you answer.

You can apply for UPSC and State PSC  of a State being a resident of State

There is a cocept of Permanent Address and Local Address

Pl go thro these provisions and ask question yourself and you get answer yourself , any doubts , state these two rules here , your questions , we may help you

Apprenlty a fraud case.  He cannot be sued in civil court as he he cause no harm to any indivualo. Criminal case can be filed by thedepartment where he applied on the basis of fraudulentsly obtaned certificate (eve if not selected). If already working he can face disciplinary action as well.