One of My client not giving any requirement to me, but he always kepp telling finish project, if i done one way , he agreed after that he goes on different places and check other softwares and come back like this product to do all, add this too, its going like the same way for 4 years, now he is telling me i havent finish any of his product, i clearely mentioned he is only keep changing requiremtn give me the requiremtn full yin documented then i can do all other wise ill not do. now he is tryng to take all employee who all are worked in my company and he is telling me like he is go legaly coz we are not finishing project. Is there any possible to file case against him or is it all are my side issue?