The presidency said the president merely directed the appropriate authorities to effect Maina's disengagement.
Maina, the wanted former chairman of the defunct Presidential Task Team on Pension Reforms (PTTPR), was last week controversially recalled and promoted to head the Ministry of Interior's human resource department.
On Monday, October 23, 2017, after his reinstatement drew public outcry on the government, President Buhari ordered Maina's 'disengagement' and ordered a full investigation into the circumstances of his recall.
The directive prompted discontent about the neglect of due process on the part of the president, an allegation the presidency has said is untrue.
In a statement issued through the presidency's official Twitter account (@NGRPresident) on Tuesday, October 24, the presidency argued that the president merely directed the appropriate authorities to effect the disengagement.
The statement read, "Reports that due process not followed in disengagement of Mr. Maina from Service are incorrect.
"The President directed the appropriate authorities to effect the disengagement, in compliance with due process.
"President Muhammadu Buhari will continue to ensure that due process is followed every step of the way."
In 2013, the ex-Pension reforms boss was dismissed by the Federal Civil Service Commission following a recommendation by the Office of the Head of Service.
In 2015, Maina was charged alongside former Head of Service, Steve Oronsaye, Osarenkhoe Afe and Fredrick Hamilton Global Services Limited before a Federal High Court on a 24-count charge bordering on procurement fraud and obtaining by false pretence through the award of fraudulent biometric contracts.
After he was declared wanted over an alleged N2 billion pension fraud, he fled abroad to the United Arab Emirates (UAE), evading the capture of the Economic and Financial Crimes Commission (EFCC).
Minister of Justice, Abubakar Malami and the Minister of Interior, Abdulrahman Dambazau, have been reported to be instrumental to Maina's recall, but, Dambazau's press secretary, Ehisienmen Osaigbovo, released a statement on Sunday, October 22, to clarify that Maina was recalled through the office of the head of service.
After submitting a full report on Maina's recall and posting to the office of the Chief of Staff, Abba Kyari, on Monday, Head of Service, Mrs Winifred Oyo-Ita, denied that she had anything to do with Maina's return.
However, fresh documents have emerged and revealed that all three top officials, Malami, Dambazau and Oyo-Ita were involved in Maina's recall.