Mich. Comp. Laws § 141.432: Verification of transactions.

Sec. 12.

For purposes of verifying any transactions disclosed by an audit or investigation, any person or firm authorized to conduct an audit under this act may ascertain the deposits, payments, withdrawals and balances on deposit in any bank account or with any contractor or with any other person having dealings with the local unit.

A bank, contractor or person shall not be held liable for making available any of the information required under this act.