I enjoy this board and have gathered many useful tips, but I don't usually post. I have found a remarkably underused resource that I would like to share: delayed birth certificates.
South Carolina State Archives has 34 cartons of delayed birth cerficate applications sorted by years of birth from 1860's to 1900. The majority being closer to 1900.
These records are not indexed, only separated by year of birth.
It seems that most of the counties are represented, although each county form was different, and some counties required varying amounts of information. I saw photocopies of bible records attached to some applications.
Information found included in the Aiken County applications:
Name, birthdate, birth place, parents names, parents birthdates if known, parents place of birth, age of parents at death, race, nationality, present address, present address of parents if alive.
Also affidavits from 2 people or bible records were used to prove age. Each county had different specifications to proof.
I have applications filed from the early 1940's to the 1960's.
I searched mainly in Aiken County and came home with over 30 applications.
The bad news is you have search these records in person in Columbia. But if you have a relative who collected Social Security there is a chance they applied for a delayed birth certificate.
Hopefully this will help someone who has hit a brick wall.