Michigan Compiled Laws, Chapter 700. Estates and Protected Individuals Code § 700.3801

Sec. 3801. (1) Unless notice has already been given, upon appointment a personal representative shall publish, and a special personal representative may publish, a notice as provided by supreme court rule notifying estate creditors to present their claims within 4 months after the date of the notice's publication or be forever barred. A personal representative who has published notice shall also send, within the time prescribed in subsection (2), a copy of the notice or a similar notice to each estate creditor whom the personal representative knows at the time of publication or during the 4 months following publication and to the trustee of a trust described in section 7605(1) 1 as to which the decedent is settlor. For purposes of this section, the personal representative knows a creditor of the decedent if the personal representative has actual notice of the creditor or the creditor's existence is reasonably ascertainable by the personal representative based on an investigation of the decedent's available records for the 2 years immediately preceding death and mail following death.

(2) Notice to a known creditor of the estate shall be given within the following time limits:

(3) If the personal representative or the attorney for the estate in good faith believes that notice to a creditor of the estate is or may be required by this section, and if the personal representative gives notice based on that belief, neither the personal representative nor the attorney is liable to any person for having given notice.

(4) If the personal representative or the attorney for the estate in good faith believes that notice to a person is not required by this section and if the personal representative fails to give notice to that person based on that belief, neither the personal representative nor the attorney is personally liable to any person for the failure to give notice. Liability, if any, for failure to give notice is on the estate.