Things have changed in the procedure of authentication with ministry of education.
I wrote a detailed blog on how to go about your authentication from my experience in July 2021.
Link:
https://medium.com/@njokuuchechi/document-authentication-at-ministry-of-education-and-ministry-of-foreign-affairs-in-nigeria-9d3505867c0e
Cheers and good luck!

barx:
For those that want further their education abroad or those that have studied aborad and need to authenticate their certificates and other relevant documents, these are some steps to be followed:

FOR THOSE WHO WANT TO SCHOOL ABROAD:

1. You go to ministry of education Abuja (Federal Secretariat) 8th Floor that's where the office is (prepare to use the stairs cos the lift is not always up dew to power failure)

You need to take all your credentials there (WAEC/NECO very important), they will ask for the certificate before the others, they may ask you for a print out of the result u are using (NECO/WAEC), print and hold the scratch card cos usse will use the serial number there. The cards are like N300 each but there its sold at N600 each and printing is N150.

2. You will get a form to fill for the authentication process. The form is sold from N100 - N500 depending on who is selling the forms that day.

3. You will then go and make payments (each document you want to authenticate will cost N300 for now), they will calculate and tell you how much you will pay. they will direct you to a bank (Diamond).

4. Before you get to the bank, find a cyber cafe around (groung floor near Zenith Bank) tell them you to help you generate payment ID from Remita. That ID is what you will use to pay in to the government account at Diamond Bank.

5. Photocopy the teller and go ask of IPPIS or Revenue office (ground floor) there there they will collect the teller and sign o the photocopy.

6. Then you go back to 8th floor and submit then wait or they will tell you when to come back.
NOTE: Dont laminate your documents yet cos they will sign and seal it
Authentication of documents is Monday to Thursday, they dont attend to people on friday.
If You can sort somebody in that office to do it for you it will be faster and it will save you alot of stress.

AFTER U ARE THRU WITH MINISTRY OF EDUCATION, YOU PROCEED TO MINISTRY OF FOREIGN AFFAIRS (5-8 MINUTES WALK)


1. You get there and tell them you want to authenticate your document that you have done that of education already.

2. They will collect it and tell you when to come back. Each document will cost N1000. foreign affairs has no stress and its sharp.


FOR THOSE WHO SCHOOLED ABORAD

If you schooled aborad and you want to authenticate your document or you want to go for service, the process is same as that of ministry of education above cos its done in the same place just that i dont know how much it will cost.
I will advise that you do it early cos the last time i was there, there, the documents are still there with the staff in the ministry and NYSC Camp has commenced already. They will be telling you that there is so much work you wont see what they are doing.
In order or not to get to the camp when the camp is ending, start the process early.