Mich. Comp. Laws § 339.919

Sec. 919. (1) A collection agency communicating with any person other than the debtor, for the purpose of acquiring location information about the debtor, shall state all of the following: (a) The name of the individual seeking the location information. (b) Whether the purpose of the communication is for confirmation or correction of location information about the debtor. (2) For purposes of this article, location information shall consist only of a debtor's place of abode and place of employment and the telephone number at each place.