No dealer shall be prosecuted under the provisions of this division when the dealer can establish a bona fide guarantee signed by a reputable wholesaler, jobber, or manufacturer within the United States from whom he or she purchased such articles that they are not adulterated or misbranded within the meaning of this division, designating it and that he or she has no knowledge of such adulteration or misbranding at the time they were purchased by that dealer. Such guarantee shall contain the name and address of the vendor who shall be amenable to the prosecutions, fines, and other penalties to which the purchaser would otherwise be amenable. Provided, however, there shall be no exemption from prosecution with regard to the sale or the offer for sale of out-of-date food products by the dealer. There shall be no exemption from prosecution with regard to the sale or the offer for sale of food products that have become out-of-date, adulterated, or misbranded after purchase by the dealer.