Alabama Code Title 40. Revenue and Taxation § 40-25-17

Every wholesale dealer in this state shall before shipping, delivering or sending out any one or more articles taxed herein, to any dealer in this state or for sale in this state, cause the same to have the requisite denominations and amount of stamp, or stamps, to represent the tax affixed as stated herein and cause the same to be cancelled by writing or stamping across the face thereof the number of such wholesale dealer, said number to be supplied by the Department of Revenue, and every other wholesale dealer shall at the time of shipping or delivering any one or more articles taxed herein make a true duplicate invoice of the same showing the date, amount and value of each class of articles shipped or delivered and retain a duplicate thereof, subject to the audit and inspection of the Department of Revenue, its authorized agents and representatives, for three years. Wholesale dealers in this state who ship, deliver or send any one or more articles taxed herein to the United States government for sale or distribution to any military, naval or marine reservation owned by the United States government within this state shall be required to carry out the provisions set out in this article for such sales or deliveries.