Legal analysis: circular is a weekly intellectual document, which is suitable for publishing matters that should be observed or known within a certain range. The circular has a wide range of applications, which can be used by general organs, enterprises, institutions and even temporary institutions, but the compulsory circular must be issued according to law, and its limited scope cannot exceed the authority of the issuing organ.

Legal basis: Article 107 of the Criminal Procedure Law of People's Republic of China (PRC), subpoenas, notices and other litigation documents shall be served on the addressee himself; If I am not here, I can give it to his adult family or the person in charge of the unit to collect it. If the addressee himself or his agent refuses to accept or sign or seal, the addressee may invite his neighbors or other witnesses to be present, explain the situation, leave the document at his residence, record the reasons for refusal and the date of delivery on the service receipt, and the addressee will sign it, which means delivery.