You would generally expect the family name to be there.
My initials are BD or BFD if I include my middle name.
If someone says to initial something, I would not write "BF."
i gave a question to write initials under information transfer
the question
Full name : Barack Hussain obama
Initials B.H.O
the above is the answer however i marked the answer wrong when the " O" is not there
so what is your suggestion
You would generally expect the family name to be there.
My initials are BD or BFD if I include my middle name.
If someone says to initial something, I would not write "BF."
I'm not a teacher, but I write for a living. Please don't ask me about 2nd conditionals, but I'm a safe bet for what reads well in (American) English.
My initials are RJC. They are definitely not RC (ar-sy)!