I am still unable to understand! Okay, what if you go legal (which you can if you want to)? Is it going to serve your purpose? I am sure it will not. First, the time involved in such legal fights will take you nowhere but just waste your energy and money. Second, you cannot force an employee to work with your organization against their wish. Third, you do not have a reasonable reason to justify why you want the employee to serve the notice of 3 months just because it is mentioned in the offer letter! Do not forget you have not issued the appointment letter. Further, if the employee is ready to pay the penalty for leaving your organization within a month, what do you expect the law to do? Give a decision in your favor that the employee should serve you for 3 months. Surprising, isn't it!
Purpose and Logic Behind Notice Period Policies
Can you please make it clear the purpose, intention, and logic behind not having the clause of "pay against notice" for probationary employees? How many such instances have happened where the employee leaves within 1 month of joining? Ideally, you need to restructure your policy and also identify the root cause of employees leaving within a month.