Lock Box System:  In this type of system, the customers are advised to mail their payments to a post office box hired through the firm for collection purposes near their region. The payments are collected through local banks that are authorized to do similar. They credit the payments rapidly and report the transaction to the head office.

Zero Balance Account: In this account any excess cash is utilized to buy marketable securities. Surplus cash is the balance remaining after the cheques presented against this account are cleared. Under the case of shortage of cash marketable securities are sold to replenish cash.