Postal Inspection Envelope

Postal inspection envelopes are typically designed for securely mailing sensitive documents and ensuring their protection during transit. These envelopes are often tamper-evident, with features such as water-resistant or tear-proof materials, making them ideal for safeguarding important legal or confidential documents. Many come with transparent windows to display mailing addresses and include self-adhesive seals for easy closure. They are widely used for postal services where document security is a priority [oai_citation:2,Envelopes | USPS.com](https://store.usps.com/store/results/shipping-supplies-envelopes/_/N-1r6djno) [oai_citation:1,United States Postal Inspection Service – Protecting you and everyone the post reaches.](https://postalinspectors.uspis.gov/). 

These envelopes are essential in industries like legal, financial, and government services where inspection and verification of contents may be required.