Kolkata-based Rabindra Bharati Society's secretary Nabakumar Sil told PTI here that Mukherjee had resigned as the Society's Chairman on June 20, much before filing his nomination for Presidential elections.
"Pranab Mukherjee resigned on June 20 and we had accepted it immediately," he said.
Pointing out that the post of Chairman was an honorary one, its Secretary said "this is a completely apolitical post. Mukherjee was made the Chairman in April 2008 as an educationist and not by virtue of being a politician or a minister."
He also said the former Union Finance Minister was not paid any honorarium.
When contacted, Ramchandra Dome, Secretary of the Institute, said Mukherjee had resigned from the post in 2004.
"Before contesting for the Jangipur Lok Sabha seat in 2004, he had resigned. But somehow his name has remained on our website. We will remove it," he said.
Earlier in the day, Sangma filed a complaint with the Election Commission that besides the post at Rabindra Bharati Society, Mukherjee also held another office of profit as vice-president of Birbhum Institute of Engineering and Technology.