Cash Management Managing Cash Inflow Lockbox System Instead of mailing checks to the firm, customers mail checks to a nearby po Box A commercial bank collects and deposits the checks This reduces mail float, processing float and transit floatCash Management Managing Cash Inflow • Lockbox System Instead of mailing checks to the firm, customers mail checks to a nearby P.O. Box. A commercial bank collects and deposits the checks. This reduces mail float, processing float and transit float