Prejudice For Not Joining The Company

without going through the offer letter, it is almost impossible to provide any legal opinion

Dear Sir, Be strong and nothing to worry.

It depends on conditions of offer letter if it was mentioned to pay 10% for failure to join company.

Hi, You have to reply to the legal notice given by company and comply with the agreement and notice provided. If the terms and conditions were accepted by then it is required to pay the 10% of the offer amount. If you find it helpful, please rate my answer. Thank You.