A variety of methods are required to identify the authenticity of ID cards. The following are some legal and practical techniques and precautions, which are suitable for occasions where ID cards need to be verified (such as enterprises, institutions, etc.). Please note that ordinary citizens do not have the right to enforce the law. If suspicious documents are found, they should contact the public security organs to deal with them. Do not deal with them privately. --- ###**1. Check of basic physical characteristics** 1. **Material and feel** -The authentic certificate is made of special PVC material, which is stiff to the touch but smooth at the edges and has no burrs; the fake certificate may have a soft texture or be too thick, and the printing is rough. -The words “Citizenship” on the front are made of metal foil hot pressing process, which has a concave and convex feeling to the touch; the fake certificate may be ordinary printing, which is smooth to the touch. 2. **Laser anti-counterfeiting pattern** -The Great Wall pattern and the words “CHINA CHINA” can be seen from different angles on the authentic certificate, and the color will change with the light; the fake certificate may have a blurred pattern or a fixed color. 3. **Miniature text and rainbow printing** -There is a miniature text of “JMSFZ” (abbreviation of resident ID card) in the shading of the real ID card. A magnifying glass is required to view it; the text of the fake ID card may be unclear or missing. -The background color is gradient rainbow printing, and the transition is natural; color block layering may occur on false certificates. 4. **Chip corresponds to information** -The second-generation ID card has a built-in chip, which can read information through a dedicated card reader (such as equipment of public security organs). If the chip information is inconsistent with the surface printing, it may be forged. --- ###**2. Information logic verification** 1. **ID number rules** -Digits 1-6: Address code (must conform to the administrative division code, such as Beijing starting with “11”). -7th-14th digits: date of birth (must be a valid date). -17th place: gender code (odd male, even female). -Bit 18: Check code (calculated by a specific algorithm, which can be verified online). 2. **The expiration date matches the age** -Under the age of 16, a 5-year certificate is usually issued, 16-25 years old is 10 years, 26-45 years old is 20 years, and over 46 years old is valid for a long time. --- ###**Three, professional tool assistance** 1. **UV lamp detection** -The authentic certificate shows the words “China CHINA” in red fluorescence and the Great Wall pattern in green fluorescence under ultraviolet light; the fake certificate may have no fluorescence or abnormal color. 2. **Dedicated card reader** -Special equipment of public security departments or financial institutions can read chip information to compare whether the printed content is consistent. --- ###**Fourth, precautions** -**Legal compliance**: Individuals have no right to seize other people's ID cards, and suspicious situations should be reported to the police for handling. -**Privacy protection**: Avoid uploading other people's ID card information to unofficial platforms at will. -**Technical updates**: Forgery methods may be upgraded. It is recommended to rely on official channels (such as the ”Citizen Identity Information Verification System of the Ministry of Public Security") or professional equipment. --- For further verification, please go through a public security organ or an authorized agency. Do not try to crack or use illegal tools by yourself.