USPS accidentally delivered a bunch of classified military documents to my parents house when I was a kid. Some government official came out to personally take them back and thanked my parents profusely for returning them.

A classified F-35 component was shipped using UPS and it somehow ended up in China

https://www.cnbc.com/2026/09/24/chinaf-f35-components-hong-k...

In the early 00s I worked in print production and we printed a ton of material for the DoE. Their own employees would give us classified documents to print into binders for presentations/meetings all the time. We were basically a Kinkos...

UPS also somehow delivered stealth F35 Parts directly to China... no espionage required