How do governments remove coins from circulation?

As previously mentioned, governments use a passive system rather than actively seeking them out or paying a bounty. The US has done this multiple times for varying reasons. read more

The government doesn’t send agents out to actively collect discontinued coins, but rather the populace gradually trades in old coins for the newer equivalent. In Norway, if a coin is to be discontinued, there are a few steps involved. read more

The government stopped actively looking for silver in circulation around 1971 or 72. The Fed or the armored car companies do still remove damaged pieces that come through their hands. They used to remove uncurrent coinage but there are really no longer any uncurrent coins in circulation The cent has been current for over a hundred years, the nickel has been "current" for 62 years. read more