Ala. Code § 20-1-55: Exemption from Prosecution of Dealers.

No dealer shall be prosecuted under this division when he can establish a bona fide guarantee, signed by a reputable wholesaler, jobber, or manufacturer from whom he purchased the article that the article is not adulterated or misbranded within the meaning of this division (designating it) and that he had no knowledge of such adulteration or misbranding at the time the article was purchased. A guarantee given pursuant to this section must contain the name and address of the vendor from whom the article was purchased, who shall be amendable to the prosecutions, fines, and other penalties to which the purchaser would otherwise be liable.