I am an individual merchant, and the goods I sell are accused of trademark infringement. I don't know what evidence or materials are needed to prove that I didn't infringe his trademark rights. Thank you. Prepare the sales entrustment contract between you and the upstream company first;

The second is to require the upstream company to issue a trademark ownership certificate, that is, a trademark registration certificate or a trademark acceptance notice;

Third, please show me your proof of purchase.

The key to this case is not you, but the non-infringement certificate issued by the upstream company. If the upstream company cannot issue it, you may also be jointly and severally liable. The upstream company bears the main tort liability. If all the above certificates can be produced, only upstream companies and rights defenders need to solve them through legal channels.