樓主，你有把你的產品放到亞馬遜上出售嗎？最近有沒有突然收到一些大批量的訂單？

我是這么猜測的，一些供應商通過亞馬遜的“Vendor Express”直接把產品賣給亞馬遜：
https://vendorexpress.amazon.com/
他把發貨時間設為1-2個月，這樣就有充足的時間到你這邊下訂單，購買你的產品，然后再把貨發給他的買家

樓上說到了關鍵點，一些賣家通過Vendor Central直接把貨賣給亞馬遜。感覺這已經成了一種在亞馬遜出售仿冒品的新手段，最近聽到好幾個賣家在討論這件事

應該是第三方賣家成了亞馬遜的供應商，在轉賣你的產品。你回想一下，你的產品供應鏈或者交易鏈有沒有出現什么漏洞，導致產品庫存泄露出去。
樓主，你去做一下test buy，最好要有產品的serial number（出廠序號）之類的東西，來證明只有你擁有這件商品

我想問一下，test buy要怎么做？這樣做會不會違反亞馬遜的賣家條款啊？

做test buy不會違背亞馬遜的條例，它可以幫你證明其他賣家的產品是不是仿冒品、是不是從你這邊拿到的。
你買到其他賣家的產品后，向亞馬遜舉報該賣家的違反行為，亞馬遜會給你發類似這樣的郵件：
“Hello,
When a detail page is created, it becomes a permanent catalog page on Amazon.com that will remain even if the creator's inventory sells out. Other sellers can list their items for sale against the page if their items match the page exactly.?
If you believe sellers are listing against detail pages that do not exactly match their items, we ask that you submit your complaint using this form:?
http://www.amazon.com/gp/help/reports/contact-us
Please include this information in your report, as applicable:?
-- Amazon.com order ID of a test buy that confirms the violation (required)
-- Brief description of the differences between the item ordered and the item received (required)
-- ASIN/ISBN of the item's detail page and the product title
-- Store or business name of the seller you are reporting
-- Other evidence that supports your complaint?
We thoroughly investigate all reports. For privacy reasons, we cannot disclose the results of our investigations, but we will take any disciplinary actions we find appropriate.
Regards,
Seller Performance Team
Amazon.com
http://www.amazon.com”

我覺得應該是其他賣家把你當成他的drop shipper（承運批發商），他手上沒有產品，只能向你買產品，來完成買家的訂單。他可能還有在其他平臺銷售產品，比如ebay。

他把發貨時間設為1-2個月，這樣就有充足的時間到你這邊下訂單，購買你的產品，然后再把貨發給他的買家