Honourable Retired Judge, Sh/e also know this particular thing that he can approach higher authorities.
But, Why higher authorities will trust Mr. Gujjar ? Prima facie it appears that school hasn't given in writing that Mr/Ms Gujjar has submitted any such Original certificate.
School had the income certificate which was fake and school believed it to be true. Under what circumstances they forwarded the same to the board.
Also, school isn't accepting that they have received any such document original document.
All it had was the document which they forwarded.
Even, usually, school authorities never give reciept for submission of any such certificate. Prima facie, Mr/s Gujjar don't have any evidence to prove his/her stance inspite of what s/he is saying.
At last, I am not perfect to answer this query.
Experts can guide him/her better.