When a mortgagee or his agent at the inception of the mortgage procures the issuance of insurance for the mortgagor then the mortgagor may substitute a replacement policy within one year after the inception of the original policy procured by the mortgagee and it shall be unlawful for the mortgagee to charge an insurance service charge for services performed in changing the mortgagee's records and accounts.
A.R.S. § 20-474