Is My Offer Letter Valid Without a Company Stamp? Seeking Advice on Unpaid Work Experience

I received an offer letter from a company that does not have the company's stamp on it. Is that a legal offer letter? I worked there for 2 months, and he didn't pay me even one rupee. I considered filing a complaint, but there are no salary slips and no stamp on the offer letter. What should I do?

Dear Rupesh,

No company will have the company seal on the offer letter provided. Also, what type of business are they involved in? You can lodge a complaint with the DC of Labour welfare regarding the same. The first step is to try discussing the matter with the company's management before taking further action. Furthermore, it would be helpful if you could provide me with the answers to the questions I posed.

Thank you.