The county treasurer shall enter a memorandum of redemption of real property in the record and shall give a receipt therefor to the person redeeming the same, for which the county treasurer may charge a fee of two dollars. The county treasurer shall send written notice of redemption to the holder of the county treasurer’s certificate of tax sale by first-class mail if the post office address of the holder of the certificate is filed in the office of the county treasurer or by electronic means if previously agreed to by the parties. The redemption money shall be paid to or upon the order of the holder on return of the certificate.