ITR Query & Form 16 Query

2) My friend work in Pvt Sector & he has not received form16 or Salary Slip & Salary also received in cash & Current Salary is Rs.4.75L. He expected from next year onwards he will receive Form 16, As he cross Rs.5L but New slab camed.So kindly suggest how can I help him to receive form16, As many employers in Pvt jobs having habit of not issuing form16 or salary slip to its employees.