2026-07-05
A structurally valid USPS barcode can still encode garbageValidating IMb from the bars: why “it scans” proves almost nothing, and how the USPS-B-3200 FCS round-trip catches encoder bugs nothing else does.
From building document QC for print & mail — specs, parsers, and honest reporting.
2026-07-05
A structurally valid USPS barcode can still encode garbageValidating IMb from the bars: why “it scans” proves almost nothing, and how the USPS-B-3200 FCS round-trip catches encoder bugs nothing else does.