What if I accept an offer and then change my mind?

If you change your mind about the job offer, you need to contact the prospective employee as quickly as possible to prevent them from accepting the offer. Once an offer has been accepted, then the contract is afoot. You're not withdrawing an offer, but terminating a contract.

This means that you are now facing potentially serious consequences, including claims for compensation on the grounds of breach of contract as well as false and misleading statements.