National Highways Authority Of India [NHAI] — fast at issuance

It is observed that at all point of sale for fastag. I. E. At bank branch etc ate collecting security deposit of 200 rs +. I have called contacted sbi, syndicate bank and other bank branches. Everyone of whom are asking the deposit charges. I need a confirmation of the waiver of security deposit, without which every point of sale is collecting security deposit. I'll purchase it only after confirmation of this matter. And the benefit is to be extended till such date of your response.