Hello Aspirant,

If you belongs to any of the reserved category like SC/ST/OBC then you must be having your reservation category/caste certificate and also the caste validity certificate. Se if you are seeking admission in IITs then you need to appear for JOSAA counselling if you will be allotted any IIT then you have to verify your documents and there caste validity certificate is necessary with caste certificate because without caste validity certificate your caste certificate is not valid. And for central caste certificate only central caste validity certificate would be considered.

For admission to IITs you need to appear for JOSAA counselling so complete process for registration for JOSAA Counselling is described below :-

• Registration for the counselling on josaa.nic.in
• Choice Filling and Locking of Choices.
• Mock Seat Allotment
• Seat Allotment Result
• Payment of Seat Acceptance Fees and Download of Provisional Seat Allotment Letter
• Reporting to the Reporting Centres
• Confirmation of Admission

For complete details about JOSSA Counselling process kindly check out the link given below :-

https://engineering.careers360.com/articles/josaa-counselling

I hope this information helps you.

Good Luck!!