Iowa Code § 154A.21: Notice of address.

1. A licensee or person holding a temporary permit shall notify the department in writing of the address of the place where the licensee or permittee engages or intends to engage in business as a hearing aid specialist. The department shall keep a record of the place of business of licensees and persons holding temporary permits.

2. Any notice required to be given by the department to a licensee shall be adequately served if sent by certified mail to the address of the last place of business recorded.