---
kind: "section"
citation: "21 C.F.R. § 1311.50"
title: "21"
number: "1311.50"
heading: "Requirements for recipients of digitally signed orders."
url: "https://uscodex.org/cfr/21/1311.50"
---

# §1311.50. Requirements for recipients of digitally signed orders.

- (a) The recipient of a digitally signed order must do the following before filling the order:
  - (1) **Verify the integrity of the signature and the order by having the system validate the order.**
  - (2) Verify that the certificate holder's CSOS digital certificate has not expired by checking the expiration date against the date the order was signed.
  - (3) Check the validity of the certificate holder's certificate by checking the Certificate Revocation List.
  - (4) Check the certificate extension data to determine whether the sender has the authority to order the controlled substance.
- (b) A recipient may cache Certificate Revocation Lists for use until they expire.

## Notes

### Authority

Authority: 21 U.S.C. 821, 828, 829, 871(b), 958(e), 965, unless otherwise noted.

### Source

Source: 70 FR 16915, Apr. 1, 2005, unless otherwise noted.