# Exempt human or animal specimens — Postal shipping restrictions by item category

For Exempt human or animal specimens, carrier is USPS; restriction type is restricted; scope is all domestic mail; conditions is Not regulated as hazardous materials; must be triple-packaged per 346.327; outer packaging must be marked 'Exempt human specimen' or 'Exempt animal specimen', recorded from its source on 2026-08-04.

- **Item category:** Exempt human or animal specimens
- **Carrier:** USPS _(our reading, not quoted from the source)_
- **Restriction type:** restricted _(our reading, not quoted from the source)_
- **Scope:** all domestic mail _(our reading, not quoted from the source)_
- **Conditions:** Not regulated as hazardous materials; must be triple-packaged per 346.327; outer packaging must be marked 'Exempt human specimen' or 'Exempt animal specimen' _(unconfirmed — we could not tie this to the quote below)_

## What the source says

> Exempt human or animal specimens as defined in 346.12 (d) , are not regulated as hazardous materials but must be packaged to meet mailing standards, including being triple-packaged

## Source

- https://pe.usps.com/text/pub52/pub52c3_025.htm

Last verified: 2026-08-04. Review by: 2027-08-04.
Part of [Postal shipping restrictions by item category](https://referencesource.org/shipping-restrictions-by-class/).