[oldcynic]

Credit cards definitely have check digits, pretty sure bank accounts don't, though I'm not certain.

Common enough that there's been a fair bit in the media[0] regularly, ever since instant transfers took off, and warnings from the Financial Ombudsman[1].

There's also been stories of people randomly discovering a few thousand appearing in their account and stupidly going out to spend it that day.

[0] First link in results https://www.telegraph.co.uk/personal-banking/current-account... [1] https://www.bbc.com/news/business-22815716

[TillE]

IBANs have check digits. That's been the standard way of representing bank + account number for a few years now.

[madeofpalk]

Maybe internationally, but usually domestically within the country IBANs aren't used, at least in Australia, UK, and United States. Hell, my bank here in the UK doesn't even give me an IBAN.

[jws]

Credit cards definitely have check digits, pretty sure bank accounts don't…

My (US) bank issues account number serially. No check digits.