-
In Denmark you would have had to provide your CPR (sort of Social Security number) AND then use a single use code to sign-0ff the transaction (you're given a 100 of them at a time on a separate document). The CPR works for everything from medical prescriptions to tax, local authorities, online purchases etc... It makes everything easier IMO but obviously it's a bit Big Brother, while your pharmacist cannot access your tax records and the Treasury your doctor's notes I'd imagine the police (or a hacker) could potentially know absolutely everything about you.
Why would an ID card be harder to obtain a duplicate of than a driving licence?