There is no university officially recognized as "Chattisgarh University." There are several universities *in* Chhattisgarh state, but no single institution with that exact name. Therefore, if you encountered a university claiming to be "Chattisgarh University," it's highly likely to be fraudulent.
Always check the official University Grants Commission (UGC) of India website to verify the authenticity of any Indian university. The UGC is the body responsible for recognizing universities in India. If a university is not listed there, it is not officially recognized.