Cheque - Lock Box

Lock Box

Typically when customers pay bills with cheques (like gas or water bills), the mail will go to a "lock box" at the post office. There a bank will pick up all the mail, sort it, open it, take the cheques and remittance advice out, process it all through electronic machinery, and post the funds to the proper accounts. In modern systems, taking advantage of the Check 21 Act, as in the US, many cheques are transformed into electronic objects and the paper is destroyed.