When you are young you tend to overstate your age (especially approaching 18 years old) while when you are older you tend to understate it ("it's the 12 anniversary of my 39th birthday"). Now news from India reveals that people who are older are also understating the age of those who are younger.
It seems that 5 players in the Indian Under 9 Girls Championship have been found to be overaged, after medical tests conducted by organisers. Despite the fact that the players parents had presented birth certificates showing they were eligible to play, there were sufficient suspicions to have additional tests carried out.
The full story is here in The Hindu.