A birth certificate or entries in the birth register are generally accepted as prima facie evidence of age of individuals. Unfortunately, birth registration is either nonexistent or incomplete in many countries of the world.
The State of Qatar has decided for official purposes to estimate the age of individuals without birth certificates. This is an interesting account of the procedure that is being used in that country.
The article is technical report No. 12 of the International Institute for Vital Registration and Statistics (IIVRS), published in 1980.
ALSO IN THIS CATEGORY