The very LATEST "Breaking News" on this issue:
It seems that India's mortal enemy, the ISI intelligence agency of Pakistan, covets these cancelled notes, for the following reasons:
Even if these demonetised notes cease to be legal tender, they contain the physical security features of regulation legal tender notes, such as the RBI security wire. The ISI Agents in India purchase these old notes, then transfer them via Nepal to Karachi, and to Peshawar in the NWFP (Pashtun ethnic nationality homeland) province of Pakistan.
The security wires from these cancelled notes are next transferred to the fake printed notes at the fake Indian note printing presses of the ISI; then, they are taken back to India for circulation via Bangladesh. The NIA of India admits that these fakes are so good they will not be detected by the common man.
Wow, that's some seriously sneaky, super-intelligent grade of evil, more like Professor Moriarty coming up with devious plans to upend Sherlock Holmes.
http://zeenews.india.com/india/isi-buying-demonetised-notes-to-use-in-new-fake-currencies-intelligence-agencies-2114749.htmlSo, if you are still in possession of any demonetised notes, I think it'll be best that you burn them all thoroughly so that all the physical security features get destroyed and can't be re-used as fakes for nefarious purposes.