Minn. Stat. § 386.78: SECURITY DEPOSITS.

The county recorder in each county may accept security deposits to guarantee payment of charges. The county recorder shall deposit any accepted security deposit in a security fund with the county treasurer. The county treasurer may invest said funds and the income therefrom shall be deposited in the general fund of the county.

The county recorder shall extend credit to any person who has made such deposit up to the amount of the deposit.

Any person may withdraw any such deposit provided that any unpaid items shall first be deducted therefrom, except that the county recorder may require a reasonable minimum deposit be maintained based on anticipated monthly charges of the depositor.