Fake/counterfeit products are a fairly common problem on the Amazon website. There are plenty of articles out there discussing how Amazon has struggled to rein this in, with limited success. (leaving to you to decide how hard they try...)
It is not surprising to me at all that this product could be out in the wild, with an exterior that is the same as the official Topping. It is common for factories in China that specialize in one item to produce for a number of different brands. It would be very easy for someone to acquire the same external case and have it rebranded - whether done with the blessing of the factory or done surreptitiously by someone connected there. i.e.: it could be as easy as buying the blank cases and taking them to another factory for painting. In fact, it may be that the factory that makes the case does not apply the final decals or paint for Topping, anyway.
-- I just did a search for "dac case" on alibaba. Look how many results there are. Appears not too hard to copy the Topping case.
https://www.aliexpress.com/premium/...ac+case<ype=premium&SortType=default&page=7
I noticed the website on the label Amirm showed (
www.aimpire.net) is not a functioning website.
The bottom line is that this is a fake, as Amirm has proven and as others here have confirmed. Unfortunately, this is not a rare occurrence in the electronics world. I think the best advice is to only buy from reputable sources and to reject anything that is obviously improperly branded. i.e.: if someone received this from Amazon, they should immediately return it without giving a second thought and not take any chances.