Checking sellers
How to verify local perfume shops
For a local perfume shop, verify the actual business, exact product and written purchase terms. Being able to visit a counter is useful, but it does not independently prove the origin of every bottle.
A HUME Fragrance buying guide

Ask for the item identity
Confirm maker, version, size and condition rather than choosing only from a scent strip or display bottle.
Check the claimed relationship
If the shop claims brand authorization, confirm through that brand where available rather than a shop sign alone.
Get usable records
Ask what invoice and resolution process are provided. Confirm any exchange promise in the actual purchase terms.
Try this before you buy
Write the exact retail item and stated after-sales process before comparing local-shop offers.