Using well-known brands for marketing without authorization carries a high legal risk, as this is often considered trademark infringement or unfair competition. To reduce the risk of legal action, you may consider the following points: 1. **Avoid using trademarks**: Try to avoid using the names, logos or other trademarks of well-known brands. Even just mentioning them may cause legal problems. 2. **Fair use doctrine**: Under some legal systems, the "fair use" doctrine allows limited use of trademarks for news reports, reviews or comparative advertising, but it must ensure that it does not cause confusion or misleading. 3. **Obtain permission**: If possible, try to obtain formal permission from the brand owner. This may involve paying a fee, but it will allow legal use of the trademark. 4. **Use a dissimilar logo**: Create original brand logos and marketing materials that are not easily confused with well-known brands. 5. **Choose your words carefully**: In your marketing content, pay attention to the wording to ensure that it does not imply any official association or endorsement. Make it clear that there is no association. 6. **Legal advice**: Consult an intellectual property lawyer for professional advice before carrying out relevant marketing activities. 7. **Educate the team**: Make sure your marketing team understands the legal terms surrounding trademark use to avoid unintentional infringement. 8. **Monitor market response**: Keep a close eye on market response and if there are any legal warnings or objections, immediately stop the activity and seek legal advice. Taking these steps can reduce some of the risk, but it cannot completely eliminate the possibility of legal challenges. Therefore, despite this, the safest course of action is to avoid unauthorized use of well-known brands.