We only generate shipping labels if we plan to ship the package out that same day (or the day after at the latest).
USPS may not always scan packages the same day that we drop them off at a USPS facility. It can take up to 24 hours for the tracking to update as tracking does not update in real time.
It is not uncommon for USPS workers to forget or forgo scanning items, especially during peak periods where there is a surge in shipping volume. We have seen cases where it's taken almost a week for a package to get any sort of scan (including the initial acceptance scan), and cases where the package was in transit to another facility in another state and did not get scanned until it is was out for delivery at the destination.
Once the package has been dropped off at the shipping carrier's facility it is considered FOB, meaning that we no longer have possession of it, so if you have any questions or issues with your package while it is still in transit, such as it being delayed or lost, you will have to contact the relevant shipping carrier's customer service as they usually have the ability to get to more information about the package than we do. We can only see what you can see using the tracking number, we are not supplied any more information than that.
The Customer Service Hotlines for each shipping carrier we use is listed below:
UPS: 1 (800) 742-5877
USPS: 1 (800) 275-8777
Fedex: 1 (800) 463-3339
If your package has been lost or arrives damaged we can help file a claim with the shipping carrier. For any issues other than that, your best bet is to speak with the shipping carrier's customer service. We usually recommend that you call them to see if they can help if your package is delayed more than 2-3 days. For delayed USPS shipments, you can try submitting a missing mail search request if the tracking hasn't updated in over 7 business days.