Form 16A - when to generate

we have not yet given anyone the form 16A. In the format it is strictly mentioned that after every quarterly return the Form 16A needs to be given to deductees.
Also i heard even if every quarter if we give 16A (for Q1-Q3) then also for Q4 we need to give the consolidated Q1-Q4 ....

But we have not given, so shall we generate form 16A backdated or with todays date. Also is it necessary that Form 16A should have a number?  a unique no.