Do you need to be present to get documents authenticated in Addis?

Hi,
I am getting married in Ethiopia to my Ethiopian Fiance soon. I have my CNI (single status certificate) and birth certificate authenticated by the Ethiopian embassy and British foreign office in the UK.

Now I need to get it authenticated in Addis by the Ethiopian Ministry of Foreign Affairs.
My question is - Do I need to be there, present for them to do it? Or can I send it and get my Fiance to do it for me?

Has anyone done this recently?
Please help!
Thank you
Fiona

As far as I know, it possible but the fees r higher. About 324 birr ($ 15) if u r present. About 3 fold if u aren't.