Michigan Probate Records
Probate and estate matters in Michigan were recorded by the clerk of the probate court in each county. Probate records were kept beginning in 1817, except in Wayne County, which began keeping probate records in 1797.
These records include wills, guardianships, administrator bonds, estate inventories, and other records. They are usually indexed. You can obtain them by writing or visiting the county courthouse.
The Family History Library has microfilm copies of probate files from most Michigan counties up to the year 1900, and some indexes or calendars to 1970.
Minnesota Research Outline. Salt Lake City, Utah: Intellectual Reserve, Inc., Family History Department, 1998, 2001.