If you are researching an ancestor who was born in the 1800s, you might assume that all their records are public because they were born more than 100 years ago. But that may not be the case.
If your ancestor married after 1942, their marriage record is not public yet. Similarly, court records, notarial records, prison records, and many other records have a 75-year limit before they become public. If your ancestor died after 1967, their death record is not public yet.
An example is my great-grandmother Cornelia Francisca van den Heuvel, who was born in 1893 and died in 1973. Her death record will become public in 2024.