Pitney Bowes SendPro Mailstation User Manual page 43

Mailing
The Priority Mail stamp has a larger barcode than the regular First-Class stamp.
IMPORTANT: Depending on the packaging you select, you will need one of the following:
Flat Rate envelope or box from the Post Office
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USPS label 400, available from the Post Office
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USPS Label 888-PB, available in the
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Pitney Bowes User Guide
PB.com Supplies
October 2021
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