(2) 15th day following a general election, special runoff election, or special election, other than a special election described in (1) of this subsection.

 (2) an official or the witnesses authorized by law to attest the voter's certificate fail to execute the certificate, except that an absentee ballot cast in person and accepted by an absentee voting official or election supervisor may be counted despite failure of the absentee voting official or election supervisor to properly sign and date the voter's certificate as attesting official as required under AS 15.20.061(c);

 (3) the ballot is not attested on or before the date of the election;

 (4) the ballot, if postmarked, is not postmarked on or before the date of the election;

 (2) when the person certified as elected or nominated is not qualified as required by law;

 (3) any corrupt practice as defined by law sufficient to change the results of the election.

http://www.akleg.gov/basis/statutes.asp#15.20.203 (d) Upon receipt of an absentee ballot by mail, the voter, in the presence of a notary public, commissioned officer of the armed forces including the National Guard, district judge or magistrate, United States postal official, registration official, or other person qualified to administer oaths, may proceed to mark the ballot in secret, to place the ballot in the secrecy sleeve, to place the secrecy sleeve in the envelope provided, and to sign the voter's certificate on the envelope in the presence of an official listed in this subsection who shall sign as attesting official and shall date the signature. If none of the officials listed in this subsection is reasonably accessible, an absentee voter shall sign the voter's certificate in the presence of an individual who is 18 years of age or older, who shall sign as a witness and attest to the date on which the voter signed the certificate in the individual's presence, and, in addition, the voter shall certify, as prescribed in AS 09.63.020, under penalty of perjury, that the statements in the voter's certification are true. (e) An absentee ballot must be marked on or before the date of the election. Except as provided in (h) of this section, a voter who returns the absentee ballot by mail, whether provided to the voter by mail or by electronic transmission, shall use a mail service at least equal to first class and mail the ballot not later than the day of the election to the election supervisor for the house district in which the voter seeks to vote. Except as provided in AS 15.20.480, the ballot may not be counted unless it is received by the close of business on the 10th day after the election. If the ballot is postmarked, it must be postmarked on or before election day. After the day of the election, ballots may not be accepted unless received by mail. (h) Except as provided in AS 15.20.480, an absentee ballot returned by mail from outside the United States or from an overseas voter qualifying under AS 15.05.011 that has been marked and mailed not later than election day may not be counted unless the ballot is received by the election supervisor not later than the close of business on the (1) 10th day following a primary election or special election under AS 15.40.140; or (2) 15th day following a general election, special runoff election, or special election, other than a special election described in (1) of this subsection. Sec. 15.20.180. Names of absentee voters to be made available. The election supervisors and election officials shall have available for public inspection the names and addresses of persons who voted absentee. Sec. 15.20.200. Time of district canvass and for counting absentee ballots. [Repealed, § 231 ch 100 SLA 1980. For current law, see AS 15.20.201.] Sec. 15.20.201. Time of district absentee ballot counting review. (a) No less than seven days preceding the day of election, the election supervisor, in the presence and with the assistance of the district absentee ballot counting board, shall review all voter certificates of absentee ballots received by that date. The review of absentee ballots shall continue at times designated by the election supervisor until completed. (b) Counting of absentee ballots that have been reviewed shall begin at 8:00 p.m., local time, on the day of the election at places designated by each election supervisor and shall continue until all absentee ballots reviewed and eligible for counting have been counted. The counting teams shall report the count of absentee ballots to the district absentee ballot counting board. An election supervisor or an election official may not count absentee ballots before 8:00 p.m., local time, on the day of the election. Counting of the absentee ballots shall continue at times designated by the election supervisor until all absentee ballots are counted. (c) Not later than the 15th day following the day of the election, the district absentee ballot counting board shall certify the absentee ballot review. (d) Absentee ballots received in the office of an election supervisor after the completion of the district absentee ballot counting review shall be forwarded immediately to the director by the most expeditious service. Sec. 15.20.203. Procedure for district absentee ballot counting review. (a) The district absentee ballot counting board shall examine each absentee ballot envelope and shall determine whether the absentee voter is qualified to vote at the election and whether the absentee ballot has been properly cast. (b) An absentee ballot may not be counted if (1) the voter has failed to properly execute the certificate; (2) an official or the witnesses authorized by law to attest the voter's certificate fail to execute the certificate, except that an absentee ballot cast in person and accepted by an absentee voting official or election supervisor may be counted despite failure of the absentee voting official or election supervisor to properly sign and date the voter's certificate as attesting official as required under AS 15.20.061(c); (3) the ballot is not attested on or before the date of the election; (4) the ballot, if postmarked, is not postmarked on or before the date of the election; Article 3. Election Contests. Sec. 15.20.540. Grounds for election contest. A defeated candidate or 10 qualified voters may contest the nomination or election of any person or the approval or rejection of any question or proposition upon one or more of the following grounds: (1) malconduct, fraud, or corruption on the part of an election official sufficient to change the result of the election; (2) when the person certified as elected or nominated is not qualified as required by law; (3) any corrupt practice as defined by law sufficient to change the results of the election. Sec. 15.20.550. Jurisdiction and time for contest. The action may be brought in the superior court within 10 days after the completion of the state review. Link to an article about the Alaska Supreme Court throwing out the witness signature requirement on the absentee ballot: https://alaskawatchman.com/2020/10/13/alaska-supreme-court-throws-out-absentee-signature-verification-law/