In order to obtain benefits for themselves, some people will choose to use some methods to slander others. Deliberately slandering other people's products constitutes a crime. In minor cases, they may need to receive public security penalties, and in serious cases, it may constitute a crime. So is it illegal to deliberately slander other people's products? What is the law? So next, I will introduce to you whether it is illegal to slander other people's products. I hope it can solve everyone's corresponding questions. 1. Is it illegal to slander other people’s products? Slandering other people’s products is an act of defamation. Eleven illegal acts shall be punished in accordance with the "Public Security Administration Punishment Law". If the circumstances are serious, it is suspected of defamation and criminal liability shall be investigated in accordance with the law. According to Article 42 of the "Public Security Administration Punishment Law", anyone who commits any of the following acts shall be detained for not more than 5 days or fined not more than 500 yuan; if the circumstances are more serious, he shall be detained for not less than 5 days but not more than 10 days, and may also be fined not more than 500 yuan. Fines: (1) Writing threatening letters or using other methods to threaten the personal safety of others; (2) Blatantly insulting others or fabricating facts to slander others; (3) Fabricating facts and making false accusations to frame others in an attempt to subject others to criminal prosecution or public security management punishable. 2. How to punish someone who maliciously slanders someone else’s trademark? Maliciously slandering someone else’s trademark is an act of commercial defamation, also known as commercial defamation. It refers to the act of damaging other people’s goodwill and infringing on other people’s right to goodwill. Specifically, it means that operators themselves or use others to maliciously slander and belittle the business reputation and product reputation of competitors by fabricating and spreading false facts and other unfair means to weaken their market competitiveness and provide The act of seeking improper benefits for oneself. According to the provisions of Article 221 of the Criminal Law, those who damage the business reputation or product reputation of others, cause heavy losses to others, or have other serious circumstances shall bear the following criminal liability: For natural persons, they shall be punished with a sentence of not more than 2 years. Fixed-term imprisonment or criminal detention, and in addition or only a fine. If a unit commits a crime, a fine shall be imposed on the unit, and the unit's directly responsible person in charge and other directly responsible personnel shall be punished in accordance with the law. 3. What are the forms of commercial defamation behavior? (1) Using forms such as distributing open letters, holding press conferences, publishing comparative advertisements, statement advertisements, etc. to create and spread false facts that disparage competitors’ business reputation and product reputation. (2) In the process of external operations, spread false facts to business customers and consumers to disparage the business reputation of competitors and slander the quality reputation of their goods or services. (3) Use product instructions to brag about the high quality of the product and disparage similar products produced and sold by competitors in the same industry. (4) Instigating others to spread rumors among the public and disseminate the quality of the products sold by competitors, causing the public to lose trust in the products so that their own similar products can replace them. (5) Organize personnel, in the name of customers or consumers, to make false complaints to the relevant economic supervision and management departments about competitors' product quality, poor service quality, infringement of consumer rights, etc., thereby achieving the purpose of disparaging their business reputation. . To sum up, according to the relevant provisions of the law, deliberately slandering other people's products is an illegal act. Causing losses to others may constitute defamation and requires corresponding criminal or administrative liability.