Pitney Bowes SendPro C Operator's Manual page 117

3. Tap the SyncUSPS Transaction Data button.
A series of messages appears on your display, starting with "Preparing Transaction Data"
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followed by "Sending Transaction Data".
The message "No Sync Required" appears if there are no new transactions to upload.
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Pitney Bowes Operator Guide August 2019
Managing Envelope Printing
117