21 CFR 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.
(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.