Wis. Stat. § 807.08: Borrowing court files regulated.

The clerk shall not permit any paper filed in the clerk’s office to be taken therefrom unless upon written order of a judge of the court. The clerk shall take a written receipt for all papers so taken and preserve the same until such papers are returned. Papers so taken shall be returned at once upon request of the clerk or presiding judge, and no paper shall be kept longer than 10 days.