Sample 2D barcode is not a QR code

[xxv]

This image is an Aztec code, not a QR code. While the advice in the article is still good, it'd probably be better to use a genuine QR code or just refer to them as "2D barcodes" or something more generic.

[xxv]

Additionally, I believe the Aztec code contains your frequent flyer number (as well as the booking code for that flight and other details that you may wish to not be public).

[hoitab]

That is good to know. I will take a look at those! Thanks XXV!