If you don't change any thing in draft bill, it will be printed to be BL.
And please don't worry about surrender. I always tell the agent that we want surrender BL.It need to be check the information contents.So please check the bill I sent you yesterday if there is anything need to be changed.Now, if we want to change the BL, we need to pay penalty, so please check carefully so we just need to change it 1 time.