The Minnesota Certification of Length of Document is a legal document that certifies the length of a document. This document is typically used for documents that are over 20 pages in length and must be filed with the court. It is signed by a Minnesota Notary Public who is an impartial witness to the document's length. There are two types of Minnesota Certification of Length of Document: 1) a flat certification and 2) a detailed certification. A flat certification is a brief certification of the length of the document, and a detailed certification includes the page numbers of the document. Both types of certification must be signed by a notary public.