Hi Aspirant,

Hope you are doing great as per the question asked by you, the validity of residence certificate or domicile certificate in bihar is of 6 months only and the tatkal residence certificate of Bihar is also valid for six month only after completion of 6 months you need to update or renew it by visiting to the nearest tehsil or S.D.M office.

Hope you found this answer useful. Stay motivated stay positive.

All the best!