If you are a brand that sells your products on Amazon and wants to authorize your brand to other sellers, you can do it by following the steps below:

1. Create a brand account on Amazon and register your brand in the brand registry.

2. Log in to your Amazon brand account and visit the Brand Registry, then select the "Authorize a new seller" option.

3. Enter the merchant ID or Amazon store name of the target seller, then select the authorized brand and review and agree to the authorization terms.

4. Confirm your authorization request and submit it, then wait for the target seller to accept your authorization.

It should be noted that when authorizing, it is necessary to confirm that the authorized seller is formal, and the brand must not be authorized to unapproved sellers. In addition, it is necessary to conduct a detailed review of the relevant agreements, terms and conditions to ensure that the authorization agreement reached is in line with your interests and needs.

If you want to know more details, we recommend that you visit Amazon's Brand Registry and Authorization Center to learn more about the relevant regulations and requirements for brand authorization.