(1)    On the certificate of the secretary, the secretary of administration shall refund to any purchaser or any banking institution in Wisconsin the tax paid on intoxicating liquor or on whole cases or full kegs of fermented malt beverages which are spoiled or unfit to drink and the tax paid on fermented malt beverages sold to the U.S. armed forces or the secretary may make allowance of the amount of the tax.

   (2)   When the tax has been paid on intoxicating liquor supplied to hospitals for hospital or medicinal purposes, or on alcohol supplied to institutions of learning or museums for nonbeverage purposes, the purchaser shall, upon application to the secretary, be entitled to a refund of the tax.

   (3)   The secretary shall prescribe the method of proof and the forms of application for refund or allowance.