1. Do you want to confirm whether the trademark owner still exists? Has the enterprise where the trademark is located been cancelled? If it is an individual, whether the individual has died. If an enterprise cancels or an individual dies for one year, the ownership of the purchased trademark disappears, and such a trademark cannot be purchased. Therefore, the notarization of the statement made at the time of transfer is the best way to confirm whether the owner still exists. 2. Confirm the status of the trademark to be purchased and the registration stage of the trademark. Some trademarks are in the announcement period of preliminary examination, public objection period, review period, etc. , which will seriously affect the value evaluation after trademark transfer. Trademark agencies generally do not recommend buying such trademarks, because the trademark in this state cannot be guaranteed to be successfully transferred to the buyer's name, or the rights will be in an unstable state. But if the buyer takes a fancy to the trademark, the trademark agent will also make suggestions according to the situation, and the price will be different, so we should make different suggestions according to the actual situation. The status of trademarks can be inquired in official website of the State Administration for Industry and Commerce, and buyers can also visit the website in real time to consult the staff of Zanbiao Trademark Transfer Network. It is best to buy trademarks on professional trademark transfer websites. 3. Confirm whether the trademark is licensed to others? Is it pledged? In these cases, it is best to entrust a professional trademark agency to confirm whether the trademark has been licensed to others before the transfer, and the time has not expired, or the trademark has been pledged or transferred before the transfer.