[jaldhar]

I forget where, but some person said Social Security began in 1940. As eligibility for payouts begins at age 65, a DOB in 1875 would have been the earliest valid one. Even fairly recently, quite a few people didn’t know the exact date they were born and in the 40s bureaucrats might have been more inclined to cut them some slack.

[ConfusedDog]

From what I read, in case of missing DoB, they might not use DoB as the qualifier. But then they have a policy to reverify at age 115 or something and every 7 years after that. But to say there are millions of people run into this nuance is still weird to me.