Wis. Stat. § 220.10

Whenever it appears to the division that any bank does not keep books and accounts in such manner as to enable the division to readily ascertain the true condition of such bank, the division may require the officers of such bank to open and keep such books or accounts as the division prescribes for the purpose of keeping accurate and convenient records of the transactions and accounts of such bank. Any bank that refuses or neglects to open and keep such books or accounts as the division prescribes shall be subject to a penalty of $10 for each day it neglects and fails to open and keep such prescribed books and accounts.