Michigan Compiled Laws, Chapter 700. Estates and Protected Individuals Code § 700.3605

Sec. 3605.(1) A person apparently having an interest in the estate worth in excess of $30,000.00 or a creditor having a claim against the estate in excess of $30,000.00 may make a written demand that a personal representative give bond. The demand must be filed with the register, and if appointment and qualification have occurred, a copy must be mailed to the personal representative. Upon filing of the demand, bond is required, but the requirement ceases if the person demanding bond ceases to be interested in the estate or if bond is excused as provided in section 3603 or 3604.  1 After receipt of notice and until the filing of the bond or cessation of the requirement of bond, the personal representative shall not exercise any powers of the fiduciary office except as necessary to preserve the estate. Failure of the personal representative to meet a requirement of bond by giving suitable bond within 28 days after receipt of notice is cause for removal and appointment of a successor personal representative.

(2) The dollar amount described in this section must be adjusted as provided in section 1210.  2