misfeasance mis‧fea‧sance [ˌmɪsˈfiːzns] noun [uncountable]
LAW when someone accidentally makes a mistake when doing something:
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misfeasance UK US /ˌmɪsˈfiːzəns/ noun [U] LAW
► the fact of someone in authority performing a legal act in an illegal way, often without intending to: »
People who have lost money are accusing the minister of misfeasance.
Financial and business terms. 2012.