31 CFR §370.39

Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗

In asserting a digital signature against you in any civil litigation or dispute, extrinsic evidence of authenticity as a condition precedent of admissibility (such as testimony about the scientific validity of digital signatures) is not necessary to establish:

(a)That a digital signature corresponds to a specific public key pair, and;
(b)That an electronic message to which the digital signature is affixed has not been altered from its original form.