Iowa Confidential Information — Social Security Number Form is a legal document issued by the state of Iowa that requires individuals to provide their Social Security numbers in order to access certain services. It is used to verify identity, process taxes, and protect confidential information from unauthorized access. There are two types of Iowa Confidential Information — Social Security Number Forms: the Request for Employer Identification Number and the Request for Social Security Number. The Request for Employer Identification Number is used by employers to obtain an identification number for their employees. The Request for Social Security Number is used by individuals to obtain their Social Security numbers or to change their name or gender designation. Both forms require the individual to provide their name, address, birthdate, and Social Security number.