It’s one of those niggling frustrations. You want to buy something at the airport and you’re badgered for your boarding pass in order to purchase. Many people ask me if they need to bother, so here’s my quick video answer… Some frequently asked questions… After I originally posted this video on social media, there were a few...

It’s one of those niggling frustrations. You want to buy something at the airport and you’re badgered for your boarding pass in order to purchase. Many people ask me if they need to bother, so here’s my quick video answer…

In October I blogged that you DO need to show your boarding pass at duty free. Over the summer I was involved in a campaign to tell people not to show their boarding passes in airport shops, as there's no requirement to do so – and shops save money if you do, that they don't (but should) pass on to us. Yet the rules are different in World Duty Free shops.

You don't need to show your boarding pass at airport shops, but you do at duty free. A media furore over the summer has sown confusion, so it's time to clear it up…