It can't be established without your signature. If the application is made, the insurance company should find an agent to verify it. If there is, it will be refunded to you in full. But your friend will be miserable! You may be fired. You'd better say hello to him!

If the relationship is not good, directly ask for a full refund and make compensation! If the insurance company disagrees, it can go to the local CIRC to sue the insurance company and apply for arbitration.