The only things I've seen are friends having to submit a photo of their ID to discord to keep using it, etc. The GP was talking about the British version of this specifically right
There’s a number of methods a site or app might use to ask you to confirm your age. They might do this check themselves or use another company to do the check. These methods include:
- Facial age estimation – you show your face via photo or video, and technology analyses it to estimate your age.
- Open banking – you give permission for the age-check service to securely access information from your bank about whether you are over 18. The age-check service then confirms this with the site or app.
- Digital identity services – these include digital identity wallets, which can securely store and share information which proves your age in a digital format.
- Credit card age checks – you provide your credit card details and a payment processor checks if the card is valid. As you must be over 18 to obtain a credit card this shows you are over 18.
- Email-based age estimation – you provide your email address, and technology analyses other online services where it has been used – such as banking or utility providers - to estimate your age.
- Mobile network operator age checks – you give your permission for an age-check service to confirm whether or not your mobile phone number has age filters applied to it. If there are no restrictions, this confirms you are over 18.
- Photo-ID matching – this is similar to a check when you show a document. For example, you upload an image of a document that shows your face and age, and an image of yourself at the same time – these are compared to confirm if the document is yours. """
https://www.ofcom.org.uk/online-safety/protecting-children/a...