Il an system is to generally audit or maintain the transaction of each and every amount of a individual (i.e) tracking by this way will avoid the black money. If this system is implemented throughout the country then there will be no words will be hearing like black money. the bit coin means that for each and every currency in our application surrendered by the user will be generating the unique id for every currency, when the amount is transferred from source to destination not only the amount and count of the currency will be taken in addition to that unique id will also be transferred so that can track the path of the currency travelling around .If the unique id is not in a rotation then can analyze which is the last account it has entered and from that account it is unseen in this way maintain the auditing.