Most QR codes do not expire. What usually expires is the service sitting between the code and the destination. That difference matters a lot when the QR code is going on a business card, poster, menu, invoice, or product label.
Source: [Dev.to](https://dev.to/augusto_verzbickas/how-to-make-a-qr-code-that-still-works-after-it-is-printed-2ce2)