In parts of Louisiana, you have to check the birth certificate to be sure. One woman was 48 before she found out she was black. https://www.washingtonpost.com/archive/politics/1983/05/21/louisiana-court-sees-no-shades-of-gray-in-womans-request/ddb0f1df-ba5d-4141-9aa0-6347e60ce52d/
THAT is amazing.