[codeN]

It was actually one of the stated secondary goals, with an appeal involving such currency being used by terrorists. However

1. While a higher than usual fake currency was detected the total fake currency detected was roughly 1 in 100,000. So there wasn't a fake note problem in general circulation. 2. The new notes launched do NOT have any additional security features, and hence while there will be a latency in getting the fakes right, it will continue to be a problem(albeit a small one).