Short Answer 
To transmit Top Secret information securely, use protected facsimile with strong encryption, engage appropriately cleared couriers, and consider using U.S. Postal Service Registered Mail while adhering to strict security protocols. Avoid commercial delivery services due to insufficient security measures.
Step 1: Use Protected Facsimile
When transmitting Top Secret information via facsimile, message, or voice, it is crucial to employ strong encryption and security measures. This ensures that the information remains confidential and is protected from unauthorized access. Always verify that the transmission method aligns with security protocols for Top Secret materials.
Step 2: Utilize Appropriately Cleared Couriers
Engaging couriers with the necessary security clearance is essential for the safe transportation of Top Secret materials. Individuals in this role must undergo thorough vetting to confirm their authorization to handle sensitive information. This minimizes the risk of leaks and maintains the integrity of the transmitted information.
Step 3: Opt for U.S. Postal Service Registered Mail
Registered Mail through the U.S. Postal Service is another viable option for sending Top Secret documents, provided that all security protocols are strictly followed. This includes ensuring proper packaging and tracking throughout transit. Avoid using commercial delivery services, as they lack the enhanced security measures needed for such sensitive transmissions.