Familiarize yourself with symbols:
Go to the official Armani website and get to know the various symbols they use on each product. The more aware you are, the lesser chances there are of being tricked. The website gives a preview of the products and from there you can note which symbol has been used and where it has been used on the product. Products like Armani jeans have their own symbol while Armani exchange has its own.
Feel the symbol:
Observe the general quality of the used symbol. Feel the embossing. This brand gives great attention to its symbol because it is the tool for building a brand image. Armani’s symbols stand true to the brand’s top notch image and the final execution is very neat and fine. If the product in front of you has a seemingly Armani symbol but with rough texture that does not go with the brand value, it probably isn't Armani in the first place.
Look for misspellings:
Misspellings always give away a fake symbol. Copiers intentionally misspell the symbol ‘Giorgio Armani’ to avoid being sued for obvious reasons. So they keep the font and style the same but introduce a slight misspelling