More on Branded Goods Failed Authentication
There is a very small chance that the "failed" product is authentic and that someone has managed to authenticate a counterfeit item (which met all the usual conditions) before the consumer has managed to authenticate their real one.
This could only be established by forensic testing after the failed product is retrieved. In either case, however, the consumer will simply hand over the failed product and receive an authentic replacement. The decision on forensic testing is a matter for manufacturers or their investigators in the field.
Manufacturers have different policies on how to deal with detected counterfeit. As it is always, however, in the manufacturer's interest to identify and locate counterfeits as quickly as possible, they should all provide incentives to encourage as many consumers to authenticate as possible. They should also ensure that the consumer always benefits from authentication - even, and especially , if the authentication process reveals they have bought a counterfeit product.
Typically they offer an authentic replacement at no charge, provided the consumer can prove who supplied the counterfeit. Manufacturers having particularly serious problems with counterfeiters sometimes even offer rewards (with appropriate conditions) when counterfeits are detected