How to tell if louis Vuitton bags are real?

I heard real Louis Vuitton Bags have a brown cloth material inside some of the purses. Is this True?
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real ones have a serial number on the inside ....:) (check out my questions ..im still waitin for an answer i can use....lol)
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check and see where the bag was made. if it says china, its a total fake. if it says italy its definietly real
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They have red cloth on the inside and on the back of the purse the Louis Vuitton's are upside down