Use of Drop Boxes for Classified Overnight Delivery Prohibited

NISPOM 5-403e authorizes the use of commercial delivery companies approved by the CSA that provide nationwide, overnight service with computer tracking and reporting features for overnight transmission of SECRET and CONFIDENTIAL material.

As indicated in Industrial Security Letter (ISL) 2006-02, Article 18, "General Services Administration Carriers for Overnight Delivery of SECRET and CONFIDENTIAL Classified Information," the use of drop boxes is prohibited.