I hope you are working in the textile industry for M/s Meher International based in Surat, manufacturing fire, yarn, etc. Regarding your query about the action to be taken against employees leaving your company without intimation even though you have all the policies in place, my suggestion is that your company should engage a lawyer/labor law expert and review all your company policies first.
Simultaneously, make a list of all those employees who have left your company without following proper exit strategies in place for the last one/two years. Send a letter by registered post with acknowledgment to their last known address, intimating them about their unauthorized exit or leave taken, and not reporting for duty is misconduct. Ask them to report for duty immediately upon receipt of the letter, failing which disciplinary and legal action will be taken against them.
If they come and try to join the company, then take the reason for the unauthorized absence in writing. If satisfied with the reply, allow them to join the company. If not satisfied, then you can take both legal and disciplinary action against them.
Alternatively, if no reply is received within 15 days of dispatch of the letter, file a police complaint against the employee for deserting the company without intimation and also initiate disciplinary action simultaneously. It is always good to take the assistance of a good lawyer while taking such actions.
Regards