Sorry. The process to send the cases to bikash bhavan is not as old as 3 yrs. Do you mean that you applied for the transfer 3 years ago. And now the case is sent to bikash bhavan recently from APC bhavan(not more than 6 month, I suppose). If this is the case All enquiries are already made at APC bhavan, and as you have satisfied them, they have sent it to bikash bhaban. And as this is a case of mutual transfer , no question should be raised about vacancy. So, it is very much expected that bikash bhaban will direct the president of Wbbpe(APC bhavan) to approve the application and APC bhavan will direct the district to give appointment on transfer to both of you. So I don’t think there is any problem. and don’t ask/say the office anything regarding training before joining. But if any question is raised you may put your point that classes is already over and if necessary leave will be taken for the exam. But the election is ahead so if it happens early it is good otherwise more waiting. Best of luck