- Do static QR codes expire?
- No. The encoded data does not expire, but a linked webpage or payment address can stop working if its destination changes.
- How do I make a printed QR code scan reliably?
- Use strong dark-on-light contrast, preserve the quiet margin, avoid oversized logos, export at adequate resolution, and test the final artwork at its printed size.
- What is stored in a UPI QR code?
- It stores a UPI payment URI containing the payee address and name, plus optional amount and note fields. The payment app still asks the payer to review and authorize the transaction.