Michigan Compiled Laws, Chapter 500. Insurance Code of 1956 § 500.3008

Sec. 3008. In such liability insurance policies there shall be a provision that notice given by or on behalf of the insured to any authorized agent of the insurer within this state, with particulars sufficient to identify the insured shall be deemed to be notice to the insurer; and also a provision that failure to give any notice required to be given by such policy within the time specified therein shall not invalidate any claim made by the insured if it shall be shown not to have been reasonably possible to give such notice within the prescribed time and that notice was given as soon as was reasonably possible.