vujanic.ch blog https://vujanic.ch/blog/ Notes and small things from vujanic.ch. A tiny tool for QR bills that don't scan https://vujanic.ch/blog/qr-bills-that-dont-scan/ https://vujanic.ch/blog/qr-bills-that-dont-scan/ Thu, 01 Oct 2026 12:00:00 GMT A photocopied QR code, a former payments person's paranoia, and a small tool that fills in Swiss QR bills for you.