First look at prices of cigarettes you want to buy, look at Contact page. Every honest company should have its customer service phone line. See where the company is registered or located.
Learn about payment options. Online store website must use SSL or any other secure payment processing systems. Be very attentive with payment processing time. While credit card payments are accepted at most in one day, e-check payment processing may take up to 14 days. Usually online stores count delivery time from date of shipping, not date of placing an order. If you have any questions call customer service. After you have cleared up everything, and sure that the company worth to be trusted go ahead and place your order.