The EPA says that legitimate products, when purchased in a box of multiple applications, will likely meet all of the following criteria:
Frontline products:
1. The lot # on the retail carton matches the lot number on the applicator package and/or individual applicators.
2. The instruction leaflet in included. It provides the following information:
First-aid statements, including emergency US telephone numbers; precautionary statements for humans and pets; directions for use; storage and disposal statements.
3..The pesticide is contained in a child-resistant applicator. The directions for opening includes an illustration that looks like the applicator package.
4. The legitimate applicator package has a notch between the individual applicator packages, which are generally absent on counterfeit products. Text should be in English only.
5. Once you open the applicator package, each applicator is labeled to include registrant’s name; the product name; the EPA registration number; the net contents in fluid ounces (not in metric measure); percentage of active ingredients and the statements “CAUTION”, “Keep out of reach of children”, and “See full label for additional directions”. Text should be in English only.
6. The applicator label for the dog products includes the size of the dog in pounds.