According to the provisions of the bill law, a check must be signed by the drawer before it can take effect. If the payee doesn't sign the check, it is invalid. Even if the manager has signed the check, he can't sign it instead of the payee. These regulations aim to protect the rights and interests of the drawer and the holder, and prevent the cheque from being fraudulently used or stolen.

So the check can't be cashed without the payee's signature. If it is inconvenient for the payee to sign in person, he may entrust others to sign on his behalf, and indicate the name and contact information of the signer on the back of the check. However, the agent must be authorized by the payee, and the signature of the agent should be consistent with the signature of the payee.