Centre SC Certificate?

Hey guy, is there any SC category aspirant who've given attempts before? I'm confused regarding the SC Certificate which is required to avail caste benefits in the exam. I have a SC Certificate issued by state govt. but some people are saying that it should be centre issued, please help me clear this doubt. Vacancy forms are about to be released so I'll need to clear this before that so that if there are separate SC Certificate for centre and state, I could get one issued by centre. Thanks