Michigan Compiled Laws, Chapters 701 to 713 Probate Code § 712.17

Sec. 17. (1) A parent who surrenders a newborn under section 3 of this chapter  1 and who does not file a custody action under section 10 of this chapter  2 is presumed to have knowingly released his or her parental rights to the newborn.

(2) If the surrendering parent has not filed a petition for custody of the newborn within 28 days of the surrender, the child placing agency with authority to place the newborn shall immediately file a petition with the court to determine whether the release shall be accepted and whether the court shall enter an order terminating the rights of the surrendering parent.

(3) If the nonsurrendering parent has not filed a petition for custody of the newborn within 28 days of notice of surrender of a newborn under section 10 of this chapter, the child placing agency with authority to place the newborn shall immediately file a petition with the court to determine whether the court shall enter an order terminating the rights of the nonsurrendering parent.

(4) The court shall schedule a hearing on the petition from the child placing agency within 14 days of receipt of that petition. At the hearing, the child placing agency shall present evidence that demonstrates that the surrendering parent released the newborn and that demonstrates the efforts made by the child placing agency to identify, locate, and provide notice to the nonsurrendering parent.

(5) If the court finds by a preponderance of the evidence that the surrendering parent has knowingly released his or her rights to the child and that reasonable efforts were made to locate the nonsurrendering parent and a custody action has not been filed, the court shall enter an order terminating parental rights of the surrendering parent and the nonsurrendering parent under this chapter.