The postage meter on your mailing system is a Postal Security Device (PSD) that incorporates the latest technology approved by your Postal Authority to secure funds. This technology eliminates the need to perform physical inspections thereby making the system easier and more convenient to use.
The PSD contains the funds and performs all of the calculations necessary to print postage indicia that comply with the latest Postal Authority standards. It is located beneath the PSD cover on the back of the mailing system.
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