I dunno, but coinbase is doing it pretty effectively. So it is objectively not impossible, unless you want it to be.

> Coinbase has more than 89 million registered and verified users

https://earthweb.com/coinbase-statistics/#:~:text=4.1)%20Rel....

There are approximately fifteen billion companies in the KYC space that provide means for automating ID verification. Very common in the financial compliance / trust & safety area of companies.

Authenticate the security features on the ID? There's a company for that.

Match the name / DOB on the ID against public record? Yep.

Check the ID against a list of known fakes? Ezpz.

Verify the format of the barcode on the back of an ID? There's another company that offers that.

You get the jist.

You are underestimating the complexity of bringing KYC to an international product which, eg, supports business accounts. If it were easy, App Store wouldn’t be inundated with fraudulent apps.