You know, truth of the matter is, even if you had a passport or a NY DL Sunoco was still not obligated to sell you cigarettes. If this particular clerk feels like being a jerk, there is no law requiring him to sell you anything. Ridiculous as it sounds, he is not required to even sell you a newspaper. Forwarding a complaint to Nassau County Consumer Affairs will most likely get you nowhere. As an aside, many conveniece stores, bars, and supermarkets have a book that shows and describes every state's ID's and DL's If this store has no such book they will have no way of knowing whether your IL DL is valid, its nothing against you, there are alot of dishonest people out there