As you already know, Amazon wants to see your invoices – business-related documents that specify and show all the details of transaction between a customer and a seller, in this case, between you and a random source of products.
In case of online arbitrage, there’s a huge problem, which cannot be solved without changing your business model. If you’re an online arbitrage seller, you have nothing but retail receipts, which are not working on Amazon anymore.
Let’s think logically, and not get mad at Amazon. Without invoices, Amazon won’t be able to verify the authenticity of your products, which will put it at risk of losing customers, and of course, their trust. Receipts won’t give Amazon the guarantee that the products you’re selling are genuine and valid, even though they are. Amazon wants to see a real contact between you and a certain supplier, or you and a brand (which is way better, by the way).
Good old days have been cut short, so now, receipts won’t work, and Amazon will send you a generic email stating that they need more information!