Iowa Code § 321.181: Temporary permit.

The department may issue a temporary permit to an applicant for a driver’s license permitting the applicant to operate a motor vehicle while the department is completing its investigation and determination of all facts relative to the applicant’s privilege to receive the driver’s license. The permit must be in the applicant’s immediate possession while operating a motor vehicle. The temporary permit shall be invalid and returned to the department when the applicant’s license is issued or when the license is denied.