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Will the postmark survive the next 50 years? With declining letter volume, the USPS has gradually moved toward Intelligent Mail barcodes (digital watermarks printed directly on envelopes). However, the ceremonial and legal demand remains. postmark
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The earliest semi-automatic mechanical canceler, nicknamed the "Cumming Machine." However, the ceremonial and legal demand remains
While legally distinct from a postage stamp—which represents prepaid fees—the postmark is an administrative seal that validates the mail piece's journey through a structured custody chain. 2. The Historical Origins: The Bishop Mark