My friend resigned from a company "A". When he had joined the company "A", he had received the amount of notice period which he had paid to his previous company. Now that he has resigned from the Company "A", he is being asked to pay back the amount that was paid to him earlier, saying that it is the policy of the company that if someone leaves the company within 1 year, he has to pay back the amount of notice period that was paid to him on leaving the previous company. Though he has resigned within 1 year, he was not told about this policy at the time of joining or payment of the said amount to him. Also, there was no document signed by him or email that acknowledges that he was told about the policy. Can the company recover the same from his F&F?