A courier transports documents locally between businesses and individuals, going door-to-door usually by bike or foot, to provide rapid and direct delivery services. Couriers are most often utilized for urgent, direct deliveries. These may include contracts requiring signatures, or passports, medical documents, and other sensitive cargo. Most couriers deliver during normal business hours, but they often work nights, weekends, and holidays to facilitate last-minute exchanges. In addition to delivery duties, couriers are also responsible for verifying recipient information, obtaining signatures, and sometimes collecting payments.