A lawyer's letter is usually sent to the infringer by a lawyer entrusted by the trademark owner, asking the infringer to stop the infringement and compensate the obligee for the loss. After receiving the letter from the trademark infringement lawyer, according to the infringement mentioned in the letter, try to check the products produced and sold by yourself. If there is any infringement, it is best to entrust a lawyer in time and actively contact the obligee or the opposing lawyer for consultation. If it is a legal channel product, you can provide a sales contract and a supply list. If you didn't know it was an infringing product before, you can stop selling it now. The following conditions can prove that the commodity is legally obtained by itself: (1) There is a supply list and payment receipt legally signed by the supplier, which is verified or recognized by the supplier; (2) There is a procurement contract signed between the supplier and the supplier, which has been verified and truly fulfilled; (3) There are legal purchase invoices, and the items recorded in the invoices are consistent with the commodities involved; (4) Other circumstances that can prove the legal acquisition of the commodities involved.

Legal objectivity:

Article 80 of the Regulations for the Implementation of the Trademark Law can prove that it is not known that the goods infringing the exclusive right to use a registered trademark were legally obtained by itself and explained to the supplier, and the administrative department for industry and commerce shall order it to stop selling and notify the administrative department for industry and commerce where the supplier of the infringing goods is located.