Illegal revocation of the offer given by an employer

An employer offered the candidate after duly verification on references and completion of all the requisites. The candidate accpted the offer and confirmed the joining date.. Meanwhile candidate resigned from his current employer and asked for early relieving just 7 days prior to the joining date given to new employer. But just 3 days before the new employer revoked the offer stating that there is some irregulaties in credentials of the candidate obtained from the market. What are the possible ways to handle with employer to get the job as per offer or to claim the compensation as the candidate is jobless now.