The official seal of the school has anti-counterfeiting code. You need to stamp the official seal of the school in the school, go to the school office and stamp it in the office. You need to register the purpose and time of your stamp. The official seal of the school has anti-counterfeiting code to prevent the occurrence of fake official seals of the school. Stamping is subject to the consent of the school principal. The director of the office can give you the official seal.