After a tracking number is generated, it may take a while before any updates are displayed on the carrier's website. Please note that during a busy promotional period, it may longer for your tracking number to update. Occasionally, carriers won't scan your packages every single step of the way, so that it can be delivered to you more quickly. It is normal for on-time packages to go a few days without being scanned, and then the tracking updates once it's in your city.