Hi Vamsi,

I understand that you are inquiring about the validity of the Hyderabad Karnataka issued caste and income certificate and thus to answer your question the caste certificate issued by any government is valid for a lifetime and is also valid for the for the generations of the candidate and for the income certificate the income certificate is valid for only one year from the date of issue and that needs to be renewed after one year from a competent authority.

Best wishes!