This classic Poland postage due stamp features the inscription “POCZTA POLSKA – DOPŁATA”, issued for collecting unpaid or insufficient postage fees. The elegant ornamental frame with symmetrical scrollwork reflects early Polish definitive design aesthetics following national postal reorganization. Denominated 5 Groszy, this stamp belongs to Poland’s early 20th-century postage due series widely used on domestic correspondence. Its clean typographic layout and deep blue coloration make it a recognizable fiscal-postal issue for specialists in European postal history. A desirable addition for collectors of postage due stamps and interwar Poland issues.