There is only one-hundred percent accurate way to determine if a person is a member of the Navy SEALs or not. This is through the Navy SEAL Database. The SEAL database includes the names of every man who has served as a Navy SEAL. However, there are a few gaps in time throughout history when files were either lost or damaged. But currently, the database contains less than 11,000 names of men who have served as Navy SEALs.