Required. According to the Customs Lawyer Network, Canadian Solar attaches great importance to intellectual property work, and the number of group patent applications and authorizations has increased steadily year by year. When importing and exporting branded products with registered intellectual property rights, customs declarations require an authorization letter. If there is no authorization, the customs will detain the goods. If an inquiry letter is issued, if the brand says there is no authorization, the customs will detain the goods and impose a fine.