# controlled substances - DEA-registered mailers — Postal shipping restrictions by item category

For controlled substances - DEA-registered mailers, carrier is USPS; restriction type is allowed; scope is domestic mail - between DEA-registered parties; conditions is Controlled substances are acceptable in domestic mail only when both mailer and addressee are registered with DEA or are exempted from DEA registration such as military, civil defense, and law enforcement personnel performing official duties, recorded from its source on 2026-08-04.

- **Item category:** controlled substances - DEA-registered mailers _(unconfirmed — we could not tie this to the quote below)_
- **Carrier:** USPS _(our reading, not quoted from the source)_
- **Restriction type:** allowed _(our reading, not quoted from the source)_
- **Scope:** domestic mail - between DEA-registered parties _(our reading, not quoted from the source)_
- **Conditions:** Controlled substances are acceptable in domestic mail only when both mailer and addressee are registered with DEA or are exempted from DEA registration such as military, civil defense, and law enforcement personnel performing official duties _(unconfirmed — we could not tie this to the quote below)_

## What the source says

> Controlled substances, and drugs that contain controlled substances, are acceptable in the domestic mail only under the following conditions:

## Source

- https://pe.usps.com/text/pub52/pub52c4_020.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/).