Iowa Code § 321.224: Record kept.

Every person renting a motor vehicle to another shall keep a record of the registration number of the motor vehicle so rented, the name and address of the person to whom the vehicle is rented, the number of the license of the latter person and the date and place when and where the license was issued. The record shall be open to inspection by any peace officer as defined in section 801.4, subsection 11, paragraphs “a”, “b”, “c” and “h” or employee of the department.