Hi Aiguo, it was simple thing:
- Birth certificate for one of our child which was printed by City Government of Addis Ababa in year 2000 used only (name and father name) in the "Full Name" field of the certificate.
- For our other child, whose birth certificate was printed in 2008, the same office used (name, father name and grand father name) in the "Full Name" field of the certificate.
Though I had never noticed that before, it was not difficult to convince them about the format change by the office over time. By the way this shows that the CO checks every detail of the documents submitted.