The messaging platform is using account activity signals to estimate users' ages worldwide, months after it paused an earlier verification effort following user backlash.
The messaging platform says the vast majority of its users will not be required to confirm their age under the new system.
The platform will try to automatically estimate users' ages first, requiring formal verification only when that isn't possible.
Ofcom says Pornhub's age-verification system may not meet the 'highly effective' standard required under the UK's Online Safety Act, prompting a formal investigation into one of the world's most visited websites.
The regulator has raised concerns about how Pornhub relies on third-party age checks provided by Apple for some users.
The UK regulator says it has concerns Aylo 'may not have conducted sufficient due diligence' in verifying the age of Pornhub's users.
Discord says the large majority of users will not be required to complete age verification as the platform's new system takes effect.
New rules taking effect this week let venues verify customers are over 18 via facial scans and QR codes, though traditional plastic ID cards remain valid.