Legal analysis: 1. Whether authorization is required to sell branded products depends on the purchase channel. If there is no authorization letter, only the voucher from the formal purchase channel (that is, the purchase invoice) is acceptable.

2. If the purchase channel is normal and it is not a fake or shoddy brand product, it does not require authorization from the brand owner or brand manufacturer. Sell ??authentic brand products, no authorization required.

Legal basis: Article 57 of the Trademark Law: Anyone who commits any of the following acts shall infringe upon the exclusive right to use a registered trademark:

(1) Without the consent of the trademark registrant Using a trademark that is the same as its registered trademark on the same kind of goods without the permission of the trademark registrant;

(2) Using a trademark similar to its registered trademark on the same kind of goods without the permission of the trademark registrant, or using similar The use of trademarks that are identical or similar to the registered trademark on the goods may easily lead to confusion;

(3) Selling goods that infringe the exclusive rights of registered trademarks;

(4) Counterfeiting or unauthorized use Producing other people’s registered trademarks or selling counterfeit or unauthorized registered trademarks;

(5) Changing the registered trademark without the consent of the trademark registrant and putting the goods with the replaced trademark back on the market;

(6) Intentionally providing facilities for infringement of the exclusive rights of others’ trademarks and helping others to infringe the exclusive rights of trademarks;

(7) Causing other people’s exclusive rights to registered trademarks other damages.