Against the backdrop of the St Stephen's molestation row, Thampu had last week met senior University Grants Commission (UGC) officials and hailed their "support" for the institute.
The Old Stephanians Association, which is not a recognised body of the college, said in its letter to the UGC that Tahmpu in his posts on social network websites "has expressed that he has the full support of the UGC and even refers to comments by a lady official of the UGC."
It urged the UGC to take action against Thampu if his statements were found untrue.