Start with the purchase chain
When assessing perfume authenticity, favour clear provenance: a house boutique, its official website or a retailer whose status can be confirmed. Keep the invoice and exact product reference. A batch code, carefully wrapped packaging or a bottle that looks correct does not, on its own, provide sufficient proof that a perfume is authentic.
Separate manufacturing questions from suspected imitation
A different impression may result from another concentration, unsuitable storage or your perception; it does not automatically establish counterfeiting. If concerned, collect the purchase information and contact the house. Manufacturing accounts provide useful context, but checking an individual bottle requires evidence relating to that particular item and the way it was purchased.