Two of the four complainants named in court documents worked with the defendant at the prestigious, all-boys school in Epsom.
It is alleged that between September last year and June, Fannin unlawfully got hold of credit cards from various financial institutions - ANZ, BNZ, American Express, GE Money and Kiwibank - in the names of other people.
At his first appearance he said Auckland Grammar were aware of the criminal proceedings and had stood him down, but school headmaster Tim O'Connor has not returned calls to confirm the school's position.
When asked earlier in the month Fannin was downbeat about his future in education.
"I'm going to get fired. I'm f***ed anyway, you know what I mean?"
Fannin refused to comment further today.
He will be back in court next month when he will have to enter pleas to the charges.
Fannin's bail conditions restrict him to living at his mother's house in Whangarei, surrendering his passport to authorities and not applying for any other travel documents.
