A message, any packages or mails which are delivered through a person is referred to as courier. In ancient times, messages used to be delivered through runners, riders on horseback and homing pigeons. In the middle ages, own messengers used to be maintained by the royal courts. In today's world mechanized courier services are offered by the courier companies. Bicycle couriers or motorcycle couriers are often there in cities. But for some consignments, lorries, aircraft, railways, are required for delivering over greater distance. Some individuals travel anywhere in the world at a moment's notice via commercial airlines, these are called on board couriers.
Duties & functions of a courier service:-