N.D. Cent. Code § 1-04-02
The acts of each properly appointed and constituted executor, administrator, guardian, officer of a corporation, manager of a limited liability company, deputy public officer, and attorney in fact, done in good faith, in the execution and acknowledgment of any instrument mentioned in section 1-04-01, hereby are declared to be valid for all purposes, notwithstanding the fact that such executor, administrator, guardian, officer of a corporation, manager of a limited liability company, deputy public officer, or attorney in fact may not have signed the same in the form required by the law in force at the time of execution, or that the same was not sealed or stamped as required by laws in force at such time, or that the certificate of acknowledgment thereon may not be in the form required by law at the time of making the same.
N.D.C.C. § 1-04-02