Nigeria FA (NFA) chairman Ibrahim Galadima says he regrets "the administrative lapse" which has raised doubts about Obafemi Martins age.
According to the NFA website, the Inter Milan striker was born on 1 May 1978 but the player's passport states his date of birth as 28 October 1984.
"I can understand why the player is angry and frustrated with us," Galadima told BBC Sport on Thursday.
"But the date of 28 October 1984 is what we have in our official records. We have tried to reach him but we haven't been able to speak to him yet.
"The NFA has its shortcomings and lapses but that's not to say people should not go deeper to see what's happening," he said without elaborating.
In what some will interpret as a classic case of passing the buck, Galadima claimed that his administration has nothing to do with the NFA website.
"The website was commissioned by the former NFA secretary general Taiwo Ogunjobi. But it has not been handed over to us."
Galadima said the website's password is still with the person who built it because he has not been paid for his work.
But when contacted by BBC Sport, Ogunjobi described Galadima's comments as "unfortunate".
He said: "I cannot make any categorical statement on the whole affair until Friday."