I've seen a number of similar requests to authenticate an item of clothing from noted manufacturers like Brioni, Zegna et al. And I understand the need for an evaluation when one is thinking about buying something online, based on pictures and descriptions. It's just that I'm not sure how well anyone, even an expert, can do this without physically handling, and looking at, these items. This is especially true when the item does not have any obvious departures from the authentic cut or style. There is a lot of information in the hand and texture of the material, and the movement of the garment while one is wearing it and moving about, that is critical to correct identification. And labels, of course, can be faked, or genuine labels sewn on inauthentic garments.
I have had a fair bit of experience in the authentication process as a collector of other objects. To draw an analogy or two, you would not want a rare book or rare stamp (I collect both) to be purchased without some form of authentication by experts. In the case of philately, you would send the stamp to an expertizing service, of which there are several, or else see if the item being offered comes with such an evaluation by an expertizer -- a certificate of authenticity. There are also technologies that can reveal forgeries and fake postmarks and cancels. In the case of books, both provenance and the reputation of the antiquarian bookseller are important, as is a photograph of the copyright page, which is rarely faked or duplicated. I would never purchase a very expensive rare book from an unknown seller on an online site without some way of authenticating it, and often the onus is on the seller to provide such verification. I point these things out to emphasize the difficulty of real authentication based on a couple of photographs viewed on a computer monitor -- or perish the thought, on a tiny cell phone screen, LOL.
Lastly, while I have not heard of clothing aficionados collecting fake clothing, it is not at all uncommon in philately to collect forgeries. In fact expertizing organizations often have collections of forgeries because they help in identifying the real thing. For example, as a member of both the American Philatelic Society and The Royal Philatelic Society of London, I can attest to the fact that these organizations have excellent collections of forgeries and outstanding expertizing services -- they do come at a cost, though. And some collectors find forgeries qua forgeries collectible!
I have had a fair bit of experience in the authentication process as a collector of other objects. To draw an analogy or two, you would not want a rare book or rare stamp (I collect both) to be purchased without some form of authentication by experts. In the case of philately, you would send the stamp to an expertizing service, of which there are several, or else see if the item being offered comes with such an evaluation by an expertizer -- a certificate of authenticity. There are also technologies that can reveal forgeries and fake postmarks and cancels. In the case of books, both provenance and the reputation of the antiquarian bookseller are important, as is a photograph of the copyright page, which is rarely faked or duplicated. I would never purchase a very expensive rare book from an unknown seller on an online site without some way of authenticating it, and often the onus is on the seller to provide such verification. I point these things out to emphasize the difficulty of real authentication based on a couple of photographs viewed on a computer monitor -- or perish the thought, on a tiny cell phone screen, LOL.
Lastly, while I have not heard of clothing aficionados collecting fake clothing, it is not at all uncommon in philately to collect forgeries. In fact expertizing organizations often have collections of forgeries because they help in identifying the real thing. For example, as a member of both the American Philatelic Society and The Royal Philatelic Society of London, I can attest to the fact that these organizations have excellent collections of forgeries and outstanding expertizing services -- they do come at a cost, though. And some collectors find forgeries qua forgeries collectible!