Adhikari, who joined BJP in the presence of Union home minister Amit Shah on Saturday, has already given up membership of the Trinamool Congress and the ministerial position in the state cabinet. Banerjee, who had on Friday clarified that Adhikari's resignation was not accepted since it was not in conformity with provisions of the Constitution and rules of the assembly, said that after speaking to him, he is satisfied that the former transport minister quit out of his own volition. The speaker said the undated resignation letter of Adhikari, which he submitted on December 16, was accepted with effect from December 21.