lock-box system　

lock-box system　加锁信箱制度　

An arrangement of several lockboxes that are strategically placed near geographic clusters of company customers，so that aggregate mail time from the customers to the lockboxes is minimized.A lockbox system is encouraged by banks，which earn a fixed monthly fee for each lockbox，as well as a servicing charge for each payment processed.For example，a company in Boston may elect to have lockboxes in Chicago，Los Angeles，Houston，and Miami，in order to reduce the mail float for payments made from customers located near these cities.