He made the disclosure on Channels TV's Sunrise Daily programme.
Hon. Ehiozuwa, who chairs House ad-hoc committee on sale of crude oil to foreign destinations, added that the Attorney-General of the Federation and Minister of Justice, Abubakar Malami, was aware of the forged letter and that investigations were ongoing to prosecute the culprits.
He said that the level of corruption in the petroleum sector which has been uncovered by his committee requires firm political will, and a radical approach to fight it.
He said: “In this letter here, this is not President Buhari’s signature but it was forged by our people – by Nigerians who wanted to sell the crude in China worth about $19 million.
“I tell you the truth, the Attorney-General of the Federation (AGF) is also aware. We are working day and night to also do what is needed to get it right because he (the AGF) is the custodian of the laws in the nation.
“So, I’m saying I must tell you that the corruption in this country didn’t just start yesterday. It is a cancer, and to cure cancer, you need a radical approach getting the radical approach in this case means you have to step on peoples’ toes, which might affect those that are probably close to you.
“What is important is ability to have that willingness to commit to the fight against corruption. Let’s give credit to Mr. President in the war against corruption. We must do our part as well."