Obasanjo as President since he left power never use "Coat of Arms" on his letter headed paper. (Frame 1)
Goodluck as Ex- President, never for once too.

In what Capacity is Atiku Abubakar using "Coat of Arms" on his personal letter even after leaving office as Vice President 18 years after?
With "Federal Government of Nigeria" As what?

When your name is good, you will not be seeking any title to validate it. OBJ will simply write: Olusegun Obasanjo in all his correspondence.

Desperate people will always do Desperate thing.