When venues (bars, clubs, supermarkets) scan your ID, they are scanning the barcode on the back. For details of what is stored on that barcode: https://www.aa

When venues (bars, clubs, supermarkets) scan your ID, they are scanning the barcode on the back. For details of what is stored on that barcode: https://www.aamva.org/getmedia/99ac7057-0f4d-4461-b0a2-3a5532e1b35c/AAMVA-2020-DLID-Card-Design-Standard.pdf https://www.aamva.org/getmedia/99ac7057-0f4d-4461-b0a2-3a553... What's on passports and some identity docs: https://en.wikipedia.org/wiki/Machine-readable_passport https://en.wikipedia.org/wiki/Machine-readable_passport There have been many cases where clubs stored the documents scanned which were then hacked. Or where club/bar staff used the scanned/stored documents to stalk attractive women. Sample: https://www.theverge.com/tech/947157/passports-data-breach-cannabis-club-systems-nefos-puffpal https://www.theverge.com/tech/947157/passports-data-breach-c...