Okla. Stat. tit. 26, § 26-14-108: Return of ballots - Witnessing of affidavit

A. The voter shall be required to mark the ballot in ink or

other manner as prescribed by the Secretary of the State Election

Board; seal the ballots in the plain opaque envelope; fill out

completely and sign the affidavit, such signature to be notarized at

no charge by a notary public; seal the plain opaque envelope inside

the envelope bearing the affidavit and return both envelopes, sealed

inside the return envelope, by hand delivery, United States mail or

by a private mail service, provided such service has delivery

documentation, to the county election board. No person who is a

candidate for an office on the ballot or who is the chair or

treasurer of the campaign of a candidate for office or who is

related within the third degree of consanguinity or affinity to a

candidate on the ballot may witness any absentee ballot affidavit.

B. The ballot shall not be notarized by any person whose name

appears on the ballot as a candidate or by any campaign chairperson

or campaign treasurer for a candidate whose name appears on the

ballot.

C. Any voter who hand delivers his or her ballot as provided in

subsection A of this section shall provide proof of identity to the

county election board and shall hand deliver the ballot no later

than the end of regular business hours on the day prior to the date

of the election. For purposes of this section, "proof of identity"

shall have the same meaning as used in subsection A of Section 7-114

of this title.