How do I avoid fake NGK spark plugs on Amazon?

Counterfeit NGK plugs are a recurring complaint across r/MechanicAdvice, r/Fixxit, and r/Honda threads, and multiple YouTube videos exist specifically to identify fakes of the IZFR6K11. Buy from sellers shipped and sold by Amazon or a recognized auto-parts retailer (O'Reilly, AutoZone, Advance, Walmart), check the laser-etched part number and packaging hologram, and if anything looks off, NGK's customer service will verify authenticity from photos.