Where to apply and where to marry…. Michigan law requires marriage applicants to complete the Affidavit for License to Marry.Both applicants must be out-of-Michigan residents. Download the Affidavit for License to Marry (PDF). Instructions. NOTE: One of the applicants must be a resident of Eaton County to apply in Eaton County, MI. Please complete the online form Affidavit For License to Marry as a public user. • File with the Michigan Bureau of Elections for a federal or state office that includes more than one county, and all statewide offices. To Apply: Complete out of state resident application below and remit to our office with required documentation. COMPLETE THE AFFIDAVIT FOR LICENSE TO MARRY FORM BY: a. The applicants must complete an online affidavit for a license to marry.