On Friday, the governing body of world football banned Siasia, 52, from football, following a long-running investigation into convicted match-fixer, Wilson Raj Perumal.
After his arrest, Perumal collaborated with investigators.
FIFA’s Ethics Committee found Siasia “guilty of having accepted that he would receive bribes in relation to the manipulation of matches in violation of the FIFA Code of Ethics.”
Siasia, a striker, played 51 times for Nigeria and had two short spells as national coach.
Acting NFF president Seyi Akinwunmi said in a statement that the FIFA report had been given to the body’s lawyers “to study and provide legal advice to the federation,” he said, adding that Siasia “gave his all for Nigeria.”
“The NFF was shocked to learn of the investigation and the subsequent decision by the FIFA Ethics Committee (Adjudicatory Chamber) placing a life ban on Mr. Samson Siasia,” said the statement.
“Siasia is a football legend but most importantly he is a Nigerian”, he said.
“We respect the FIFA processes”, said Akinwunmi but added, “the least we as a Federation can do is empathise with him at this time make ourselves available to him and hope that in some way he is able to clear his name.”