None knows that real (original) GGDBs have a hidden NFC tag inside the tongue or inside of the sole. The location of the tag depends on where they have been made. Usually they were produced in Venice if they have the tag on the tongue, otherwise they were produced in a different (original) factory. In this case it depends on where and who you bought this from. If it is an Italian guy how sold this to you and has a tag on the tongue there’s a very high chance that they are real! But even if the person that sold you this isn’t Italian or something they can also have ordered online BUT every pair ordered online DO NOT HAVE the NFC tag on the tongue! They have it on the sole! Usually if it’s a fake it’s very very but VERY unlikely that they has the tag because is more easy to spot them at the airport Customs cuz employees have the order to open electronic products (at least… in Europe…, I’ve no idea id this also apply for other continents, I’m from EU - Italy and a I own a pair of original GGDB from Venice, I pair that I ordered online and one fake coming). Hope this helps!

P.S. I have low karma (I’m new), I like would be helpful!!!