Michigan Compiled Laws, Chapter 720. Probate § 720.218

Sec. 18.If the state public administrator or a county public administrator has been appointed fiduciary of an estate under the provisions of this act and has completely administered the estate and if the residue of the estate has been assigned to the people of the state of Michigan as an escheated estate by the judge of probate having jurisdiction of the estate, the fiduciary shall deliver the assigned residue to the state treasurer pursuant to the uniform unclaimed property act,  1 together with a true copy of petition for appointment of administrator and certified copies of final account, order allowing final account, and order assigning residue. In addition to the requirements under the uniform unclaimed property act, the state treasurer, upon receipt of the residue of the estate, shall furnish the fiduciary with official receipts for the residue, in duplicate, 1 to be filed with the probate court having jurisdiction of the estate, the other to be retained by the fiduciary.The fiduciary shall deliver to the state treasurer, together with the residue, any personal effects of the deceased, such as abstracts of title pertaining to real estate that has escheated to the state, unsurrendered insurance policies, receipts, documents, correspondence, or other material having probative value that has come into the possession of the fiduciary and would tend to prove or refute any future claim of ownership in or to the residue. The state treasurer shall hold the personal effects of the deceased pursuant to the uniform unclaimed property act and make them a part of the records of the estate.