In today's news ....
http://www.news.com.au/finance/money/why-we-shred-1nbspmillion-in-cash-every-hour/story-e6frfmci-1227524081692 (http://www.news.com.au/finance/money/why-we-shred-1nbspmillion-in-cash-every-hour/story-e6frfmci-1227524081692)
"In the next decade or so, the government will try to slowly get back all the existing cash in Australia and shred it all." :blink:
Pedro
Meanwhile, zero cryptocurrencies wore out and had to be destroyed. :P
Banks call it muting
Nothing new about the practice
Yeah currency deemed unfit for circulation are sent back to the RBA for exchanging new currency and destruction of old