Some of their products are offered direct. Others are Amazon only.
I'd purchased several PowerLine cables that all died within a month or so of purchase. I attributed it to being a cheap cable.
Sold by AnkerDirect and Fulfilled by Amazon
Edit: formatting.Not even "Ship from and sold by Amazon.com" is safe for the same reason I believe.
To clarify: This is based on experiences I've had en AmazonES buying things directly from Amazon (Gillete razors from the top of my head) and them being obviously fake. Also from previous discussions in HN
Really wish they wouldn't mix SKU and stock. Perhaps its cheaper for them and if the customer notices they can replace it and still come out ahead. But it doesn't seem fair for someone who can't identify a fake product.
So, to answer your question: if that all happens, and assuming AnkerDirect doesn't have shady stock, then yes, it should be genuine.