Crafted items in FFXIV retain the creator's name. So, if items were crafted within the same world, they will obtain a unique brand name in this world. However, characters can share the same name in different worlds which makes it possible to hand over the items they crafted to characters from other worlds so that there is no way to differentiate between the original and the fake brands.
Sakaguchi asked players not to sell any items with the sakaGUCCI label to make it more fun and warned that if items had been made into an illusion with the Mirage Dresser, the name would be removed.
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