"Accident, mistake or misfortune" means something beyond the claimant's control and not due to the claimant's own neglect, or something which a reasonably prudent person would not be expected to guard against or provide for.
N.H. Admin. Code § Rev 1201.01
#7154, EMERGENCY, eff 12-13-99, EXPIRED: 6-10-00
New. #7365, eff 9-19-00; ss by #7910, eff 6-25-03, ss by #9946, eff 6-23-11