An additional factor is that where the tax liability has been met by way of reversal of ITC and similarly recovery is effected from the supplier as well, this would amount to a double benefit to the revenue. Thus, while the Department may reverse credit in the hands of the purchaser, this has to be a protective move, to be reversed and credit restored if the liability is made good by the supplier. Thus, the substantive liability falls on the supplier and the protective liability upon the purchaser. A mechanism must be put in place to address this situation.