The Wisconsin GN-3120 Affidavit of Service is a form used to provide proof of service of legal documents to individuals who are subject to guardianship, conservatorship, protective placement, or protective services. The form must be completed and signed by an individual who is authorized to serve legal documents, such as a sheriff, process server, or other authorized individual. The form includes sections for the date of service, the name of the document served, the name of the individual served, and the signature of the server. There are four types of Wisconsin GN-3120 Affidavit of Service: guardianship, conservatorship, protective placement, and protective services. The type of service must be specified in the form.