There are many self-operated products on Amazon without brands
Not all Amazon categories require brand registration, this is a requirement for some categories.
If there is no requirement, you can write "No brand" or "N/A", "N/B", "N/C", "N/D", or "generic".
If you don’t know the details, you can refer to: Amazon Help Center and Amazon Brand Text Description.
When the error code "5665" appears when you upload products, it is basically a problem with Brand, which is not a registered trademark.
If the error message says "The UPC/EAN/ISBN/ASIN or JAN code you are using does not match the product you are trying to publish, if you think this message is wrong, please contact the seller support team."
p>The solution to this problem is to fill in "N/A" on the trademark. If the error continues, you can use "Generic Brands", "Generic", "NO Brand", etc. instead.
Some sellers will apply for a trademark whitelist to facilitate later use, but in fact there is no protection, but its existence is reasonable.
If you want to apply for a whitelist, you can open a case in the background and consult with customer service. It will send you a list of required information. You just need to prepare according to the information it provides.