I read about this happening a lot here and elsewhere, and I don't get it. I buy many iDevices from Amazon, for example Apple Watch Ultra (1, 2, 3), and AirPods Pro (1, 2, 3). Most with AppleCare 2 years plan, some without. Also some accessories.
If the item is counterfeit, not only is sometimes the packaging/actual product identifiable by anyone that is actually a tech person, but lets assume that it's identical or whatever.
Unboxing?
When you open the AirPods box for the first time does the iPhone do that animation and say "Set up AirPods..." etc?
When you use it, does it sound at least kinda like the quality you expect from a 200 USD Apple headphone? Does Dolby Atmos work, the stems on both sides, the wireless charge on the box, the Find My features, live translation, transparency, noise cancellation? All of those features are present and working?
Going to settings -> AppleCare and Warranty should show the time of manufacture, of purchase, and the end time for the warranty (or if AppleCare, for AppleCare).
I guess I see a counterfeit passing my step 1: hardware, or maybe step 2: software (really shouldn't tbh? Apple should cover for this).
But the data on AppleCare and Warranty come from Apple's server. Even if they spoofed the serial number that would mean guessing a correct serial number for that same product type and spoofing the date of sale etc on AppleCare&Warranty.
I honestly don't see how this can happen. If the counterfeit is honestly so identical at that point it's just the same product, but even so.
I buy clothes, other tech stuff there. Is it really necessary to instill on me and hundreds of other OCDs the constant existential fear that everything we buy is actually an exactly identical and unverifiable impostor of the real item, but not actually real?
Edit: Just to clarify, I've indeed used warranty/AC+ on most of these items and all were real. For now.