When any person, as trustee, mortgagee, assignee, or otherwise, possesses or has any fire insurance policy on realty made payable to the person, or other person as that person's interest may appear, then the insurance as to the interest of the trustee, mortgagee, assignee or other person named in the policy shall not be invalidated by an act or neglect of the mortgagor owner of the property so insured, nor by any foreclosure or other proceedings or notice of sale relating to the property, nor by change in title or ownership of the property, nor by occupation of the premises for purposes more hazardous than are permitted by the policy; provided, that, in case the mortgagor or owner neglects to pay any premium due under the policy, the mortgagee, trustee, assignee, or other person shall on demand, pay the premium; and provided, further, that the mortgagee, trustee, assignee, or other person shall notify the insurance company of any change of ownership or occupancy or increase of hazard that comes to the knowledge of the mortgagee, trustee, assignee, or other person, and, unless permitted by the policy, it shall be noted on the policy, and the mortgagee, trustee, assignee, or other person shall, on demand, pay the premium for the increased hazard for the term of the use of the property, or otherwise the policy shall be null and void; and provided, further, that in the event the insurer concludes to cancel its policy under its terms, then ten (10) days' notice of the determination shall be given to the mortgagee, trustee, assignee, or other person so interested.