I want reliving letter of company which i served 4 years back

Dear Sir,

Yes — you can take legal action, but the nature and strength of your remedy depends on your employment status (third-party contractual) and the documents you have.

Legal Notice (Most Effective)

Send a formal legal notice through an advocate demanding:

Acceptance of settlement

Issuance of Experience / Service Certificate (not “Relieving Letter” wording)

Closure of employment record

Dear Client,
The relationship between an employer and employee is governed and regulated by the terms and conditions as outlined in the offer or appointment letter, accepting which an employee joins in her or his assigned position in an organisation. In case, it is explicitly mentioned in the offer letter or appointment letter specifying that an employee is required to serve a notice period before tendering his or her resignation and for non-compliance of such terms of contract of employment, the employer can withheld the relieving letter or F & F dues for breach of contract treating such absence of the employee absconded without notice which is also considered a misconduct on the part of an absconded employee and employer can initiate disciplinary action against them following their HR Poliicy. So, the chance of getting a relieving letter from the employer is not feasible as of now, even through litigation. However, in the given scenario, by serving a legal notice to the employer/company, you can take a chance by pursuing your grievance before the concerned Labour Commissioner or the Inspector, Shops and Establishment, for a resolution in the matter.