To update the brand name on three ASINs, it’s best to open a single support case that includes all ASINs, clearly explains the reason for the change, confirms brand ownership, provides supporting documentation (like trademark proof and updated packaging images), and ensures consistency to improve the chances of approval.
If the three ASINs are related and part of the same brand correction, it’s best to open a single support case and clearly list all three ASINs together, explaining that you’re requesting a brand name update across them for consistency. Amazon typically reviews brand change requests on a case-by-case basis, and grouping them in one well-documented case can help provide context and show that it’s a coordinated update rather than isolated edits. Make sure to include supporting documents like your brand registry status (if applicable), trademark proof, or product packaging photos showing the correct brand name printed on the product and packaging. If the ASINs are unrelated or belong to different product types, then separate cases might be more effective. But for similar products under the same issue, submitting them together in one detailed request often works better.