Yes, the official seal has an anti-counterfeiting mark. When the official seal is engraved in the official seal engraving place designated by the administrative department for industry and commerce, anti-counterfeiting marks will be affixed to the official seals of all units in the engraving place, and the anti-counterfeiting marks on each official seal are unique and different. In order to facilitate management, the size of the official seal is the uniform size stipulated by the administrative department for industry and commerce.