Kemi Adeosun, the finance minister until yesterday, in her letter of resignation to President Muhammadu Buhari responded for the first time officially to the allegation of forging the NYSC exemption certificate, by expressing profound shock.
It is, however, not clear when Adeosun submitted her resignation letter.
Allegations that Adeosun had used a forged exemption certificate to avoid participation in the youth service scheme surfaced in recent months in the Nigerian media.
Adeosun resigned her appointment on Friday, 69 days after an online medium published a report that her NYSC certificate was not issued by the Corps.
"The PDP therefore demands an immediate open inquest into the records of the Finance Ministry under Mrs. Adeosun, to unravel all improprieties by the Buhari Presidency cabal, including alleged diversion of oil proceeds, fraudulent oil subsidy deals, leading to high fuel price; depletion of our foreign reserves, embezzling of funds retuned by Switzerland and other huge sleazes in the ministry".
She courted controversy again when she suspended and subsequently fired Mr Munir Gwarzo as the Director-General of the Nigerian Securities and Exchange Commission with Gwarzo challenging her powers to suspend him.More news: Manchester City Announce Revenues in Excess of £500m in Record Breaking Season
More news: FEMA administrator under investigation for travel, use of government cars
More news: Mobile Launches iPhone Xs BOGO Deal and Free Voice Line
This was contained in a statement by Femi Adesina, presidential spokesman.
But an internal investigation showed that it was forged.
The president also approved that Zainab Ahmed, the minister of state for budget and national planning, should oversee the ministry immediately.
She is a fellow of the Association of National Accountants of Nigeria (ANAN), a member of the Nigerian Institute of Taxation and the Nigerian Institute of Management.
"Our investigations reveal that the Federal Government, which earlier made efforts to defend Mrs. Adeosun, has already perfected a plot to help her to evade prosecution following fears that she could open up on the gigantic corruption going on in the financial sector under the Buhari administration".
NYSC is a one-year mandatory national service for graduates below the age of 30 from universities across Africa's most populous nation.