I believe they use name, address and dob. What they do is scrub the web and data bases verifying your identity.
Which means that most of your information is "out there" anyway.
Heck, anybody who is concerned about identity, data mining, and safety from viruses and uses Facebook has already been compromised in every way possible.
All of this age verification is just hoop-jumping. Everybody has most of the information you are giving out anyway..........like thousands of less-than-secure CC processors. (remember, ecig vendors all had problems even back in 2012 getting CC processors......ecig stuff is and was considered "high risk" and they monitor you for chargebacks, etc. and probably an extra fee.) And many of us were getting hacked after making purchases.
It's like some of the pipe and cigar sites.....been in business forever like smokingpipes.........they have to pay their processors an extra fee to be in the "high risk" group. From what I understand, even Paypal has a category like that. MasterCard is the most villainous. I did quite a lot of reading about CC processing 2 years ago.
Veratad just uses your legal name, billing address, and date of birth, and all of that information is already in public databases pretty much.
As for Bluecheck, nobody can "do" anything with the last 4 digits of your SS number.....it's just used to re-check against the other information. Paypal and Amazon and about 1,000 other places (doctors offices) have that info on me anyway and all this info is exchanged by any office in that particular system.
The ONLY reason why they would need a copy of your Drivers License is if they can't verify your data against the databases. I would not bother with that. But I wouldn't have to. If you have owned a home, have bank accounts, have ever ordered a credit report, etc. your legal name, DOB, and billing address is
already in a database somewhere.
It doesn't really bother me much. It's much more of a headache for the vendors who are having to choose a system to use with their shopping carts.