Nebraska Revised Statute 64-105.01
A notary public is disqualified from performing a notarial act as authorized by Chapter 64, articles 1 and 2, if the notary:
(1) Is a spouse, ancestor, descendant, or sibling of the principal, including in-law, step, or half relatives;
(2) Except in the performance of duties pursuant to sections 64-211 to 64-215, has a financial or beneficial interest in the transaction other than receipt of the ordinary notarial fee or is individually named as a party to the transaction; or
(3) Does not understand the acknowledgment or notarial certificate used to certify the performance of his or her duties.