Buying pre-loved sneakers can be stressful. You want the best price, good condition and you also want total peace of mind.
At NASS, we back up our Authenticity Guarantee Policy with a strict, two-step verification process. We don't guess. We verify.
1. The In-Hand Inspection
Every sneaker that enters our shop is manually inspected by our team. We check the obvious red flags: the factory smell, the leather texture, and the shoe's structure.
2. The CheckCheck App Digital Verification
Once a shoe passes our manual test, we run it through the CheckCheck app—the industry standard for digital sneaker verification.
We take close-up, macro photos of the hidden details replica factories always miss:
- Inside size tags and font weights
- Under-insole stitching patterns
- Box labels and barcode alignments
The app combines advanced AI with master human authenticators to give us a definitive verdict in minutes. If a shoe doesn't get a perfect passing grade, it never hits our shelves.
Shop and Sell with Confidence online
Because we use this high-tech process, we can cash out local sellers in minutes and give our buyers 100% confidence.