The Minnesota Certificate of Service For Service By Mail is a document used to prove that legal documents were properly served on a person or entity by mail. It is filled out by the sender after they have mailed a copy of the legal document to the recipient. The certificate must include the date of mailing, the names of the sender and recipient, the address of the recipient, the type of document served, and the method of service. The certificate must be signed and dated by the sender. There are two types of Minnesota Certificate of Service For Service By Mail. The first type is for documents served by regular mail, and the second type is for documents served by certified mail. The regular mail certificate must include the document's tracking number, while the certificate for certified mail must include the certified mail receipt number. Both certificates must be notarized.