The question of legality comes up frequently in regards to doctors excuses. The majority of websites offering novelty doctor's excuse products will provide information regarding legal concerns. You should review this information carefully.
In addition, before purchasing a novelty doctors excuse most websites require customers to agree to a purchase contract outlining their agreement to use the documents for novelty purposes only.
Most websites offering doctors excuses advise you to check with federal, state and local laws before placing an order thereby placing the responsibility for legal compliance with the purchaser. Therefore, it's up to you to read the fine print and make sure you comply with the laws of the land.