Anthropologie items are relatively pricey, so some sellers use the term in their title so that you'll see their items even if they're not really Anthropologie. Some of their tactics are technically legal (though deceitful and manipulative) and some are downright illegal. Some schemes to look out for:
1. BEWARE of sellers who claim that the shoes, bags, and housewares they sell are from Anthropologie. If they don't mention the brand (esp. shoes and bags), then ask for it; you can usually google it or check anthropologie.com to see if the store ever actually carried those items. There are certain brands (like "Chinese Laundry") that were never sold at Anthropologie. The seller is just trying to pass them off as such.
2. Sellers often claim that items from Urban Outfitters are actually from Anthropologie (or they write BOTH Urban Outfitters and Anthropologie in their title): While UO and Anthro are owned by the same people, they are two very different stores, carrying different brands with different levels of quality and, significantly, different PRICE POINTS (it's similar to the difference between Banana Republic and Old Navy, also sister stores). Anthropologie items are generally better quality than Urban Outfitters, and this is reflected in their price. So if you find yourself paying Anthropologie prices for something you think is from Anthropologie but is actually from Urban Outfitters, it doesn't matter that they're owned by the same people -- they are DIFFERENT stores, and you will have been duped.
3. Some sellers are fair enough to write "Like Anthropologie" in the title, although that practice also constitutes keyword spamming. At least then they're not lying to you.
4. When you run a search for Anthropologie items, you have to add a whole list of "minuses" to avoid getting results that include non-Anthropologie items whose sellers just add "Anthropologie" in the title to appear in your search results. These include:
-top (these 2-item auctions include a mysterious "top" supposedly from Anthropologie; the seller, strangely, can never get a good photo of this "top," only of the other item)
-tp
-note
-bag (this is either the Anthropologie paper bag that you get when you buy something at the store, or the tiny mesh bag that encloses the receipt when you order something from anthropologie.com)
-card
-gift
-lotion
-mon (one seller always includes a cami by a brand conveniently called "mon anthropologie" with her item)
I hope this helps!
Happy (and careful) shopping!