ARM 24.40.803. EFFECTIVE DATE, BACKDATING, AND CANCELLATION OF CLAIM

(1) A claim is effective on the Sunday of the week in which the claim is filed and remains in effect until: (a) the end of the benefit year; or (b) the claim is cancelled. (2) A claimant may request cancellation of a claim within ten days after the date of an initial or revised monetary determination. A cancellation request may be done through the online portal or by mail. (3) The department may backdate a claim or grant a late request to cancel a claim if the claimant shows good cause for the delay in filing the claim or requesting cancellation.