Hi {Seller Name},
I see that you are also selling YOUR BRAND. However, I have created the YOUR BRAND from scratch, and have never resold any wholesale items to any other reseller.
I own the brand, and have not authorized you or anyone else, to sell YOUR BRAND on Amazon.
If you are selling a different brand, while posturing as YOUR BRAND, then you are selling counterfeit products, which is something that Amazon takes very seriously and will shut down your account without warning.
If you do not remove your product from the YOUR BRAND listing within 24 hours, I will have to contact Amazon and issue a formal Cease and Desist letter. This is obviously not an ideal situation for either of us, so I hope that you take heed to this note and remove your product from YOUR BRAND listing immediately.
Thank you for your prompt attention.
Sincerely,
Your Name