Abdullahi is billed to proceed on his voluntary retirement from Tuesday.
The Customs boss had earlier written a letter dated August 3 to the President notifying him of his desire to proceed on voluntary retirement from Tuesday.
President Buhari’s approval of Abdullahi’s request was dated August 14 and personally signed by the President.
In the letter, the President thanked the NCS boss for his services to the county in the last six years.
The President’s letter, titled: “Voluntary retirement from the Nigeria Customs Service” read: “Dear, Alhaji D.I. Abdullahi. I write to acknowledge the receipt of your letter Ref. No. NCS/ADM/HQ/P. 35802 of 3rd August, 2015 conveying your decision to voluntarily retire from the Nigeria Customs Service with effect from Tuesday, 18th August, 2015.
“I note with appreciation your services to this nation, especially as the Comptroller-General of the Nigeria Customs Service in the last six (6) years.
“Accordingly, I hereby approve your voluntary retirement from the Nigeria Customs Service with effect from 18th August 2015.
“I wish you the very best in your future endeavours.
“Yours sincerely, Muhammadu Buhari.”
The Nigeria Customs boss had in his letter to the President thanked him for the confidence and trust reposed on him since he (Buhari) was inaugurated on May 29.
Stressing that he would be six years in office as the Comptroller-General of the NCS by August 18, Abdullahi recalled that on assumption of office, he articulated six-point agenda which he vigorously pursued.
According to him, the agenda had positively impacted on the efficiency and performance of officers of the service and had drastically changed the negative perception of the service.