Branch QR codes that expire in the car park

A QR printed at the teller counter may be technically correct and still fail the journey. Customers gather bags, answer a call, or walk to a brighter spot before opening the camera.

In handoff studies we time the gap between print and first successful scan. When expiry sits inside that gap, branch teams improvise — reprinting, reading codes aloud, or abandoning the digital continuation entirely.

Adjustments that stay grounded

• Align expiry with observed lobby times, not only security minima discussed in isolation
• Give staff a scripted explanation when a code must be short-lived
• Offer a non-QR continuation that does not require memorising a twelve-digit reference in the car park

None of this argues against careful security. It argues for measuring the human interval your policy assumes.