N'Daw, who is registered as a 35-year-old, came out of retirement last year to join amateur French club AS Algrange to resume a career that began back in 2002.
Within nearly two decades of professional football, N'Daw won the 2007 Coupe de France with Sochaux, represented Saint-Étienne, Nantes and spent time in England and the Spanish top-flight.
However, in a shocking interview with IGFM, N'Daw openly admitted he was older than his registered age over the course of his professional football career.
"What is certain is that in Senegal, 99% of players have reduced their age," he explains.
"Senegalese [players] are generally very small and when he goes to Europe at 20, he will see that young people of 15 are stronger than him.
He added: "Like all Senegalese, I lowered my age to be professional. In Africa, the player who does not lower his age cannot be professional [in Europe], it's a reality."
The towering defender earned 41 caps for the Teranga Lions between 2005 and 2012 before announcing his retirement from the game at the age of '31'.