USPS Domestic is traditionally cheaper, but does not provide detailed tracking. If you select USPS as a shipping option you can either chose First Class or Priority. Below is the difference between these two shipping options.

 Please note that we no longer offer USPS to some regions due to difficulties delivering reliably to customers there.

• USPS Domestic First Class packages are un-trackable. Once it has been sent it’s pretty much outside of our control. There is no way to track packages! There may be delivery confirmation with 1st class, but it's not the same as tracking! It is also not a time-guaranteed services. First class mail can take up to 2 weeks. First class mail is low cost and used at your own risk. We only permit it for orders under $200. Insurance is automatically calculated and added to your order. Lost package claims may be filed between 45 and 90 days after shipment. USPS has experienced many slow downs and delays - here's an overview of what we've seen for some customers.

• Priority Mail has delivery confirmation (which is not tracking, but will let you know when the package has been delivered) Insurance is automatically calculated and added to your order. Priority mail can take up to 3-5 business days once shipped.

About Delivery Confirmation

Delivery Confirmation is a semi-tracking system by the USPS. A package will usually be scanned a couple times on its way to you. Sometimes it is not scanned at all. If you notice that a package does not have a scan but we have emailed you that it shipped, don't worry! Unlike UPS/FedEx, its not unusual for a package to make it all the way to you without a scan until it is actually delivered

What Do I Do If My Package Is Late?

If your order does not arrive by the above mentioned time, please contact the USPS directly through your local post office to inquire about the status of your package.

Often times, your package is at your local post office waiting for you. Look for a 'pink slip' indicating your package is at the post office. You may need to bring that slip and/or identification to pick up the package

If they are unable to assist you, please contact Adafruit Customer Support.