@ Tarun Singh,
Appointment letter should also have been supplied to you, after offer letter.
Demand both from good offices of appointing authority, MD in writing under acknowledgment.
Do not resign with immediate effect. Tender some reasonable notice and state that no tasks are pending at your end.
Don’t remain entangled with HR, Bosses and seek advise from elders in the family, lawyer too.
The notice period shall not depend upon offer letter/appointment letter alone.
If standing orders are applicable (certified/Model) then it shall prevail upon appointment letter/offer letter.
If the employer defaults on payment of wages it may default on payment of PF, ESIC, TDS etc also.
Employee can approach;
--- Trade Unions e.g; CITU, AITUC, INTUC ............................
--- Inspector under (Name of your state) Shops and Commercial Establishments Act, If it is commercial establishment.
The employer has to maintain and submit requisite forms and registers according to Shops and Commercial Establishments Act.
If the employer makes false entries it is offence.
--- Inspector under Payment of Wages Act: applicable to all employees drawing wages up to Rs.18000/pm as per def. of wages in the Act.
You may refer to: Payment of Wages Act; Sec13A and 2: 3*[(i), (ia), 3*[(vi), 3, 4 ,5, 13a, 14, 15, 16, 17A, 20………….. and if the Inspector agrees to cover you may immediately submit Form’N’ for recovery of wages.
--- O/o Labor Commissioner
--- ESIC Inspector;
--- RPFC in nearest PF office
--- ITO; TDS where you file your ITR
--- CIT-TDS (jurisdictional) where company files ITR
---Controlling Authority of Gratuity
---Civil Court