The state's Integrity Commission received 140 complaints over alleged misconduct within the public sector last financial year, of which 79 were dismissed.
This represented 53 fewer complaints received in 2017-18.
Forty-one complaints were accepted for assessment and 20 complaints referred for action.
Reasons for dismissals included that it was not in the public interest to investigate a complaint or that a complaint lacked substance or credibility or was frivolous or vexatious.
There were 15 anonymous received over 2018-19 and another eight complaints from people who wanted to remain anonymous.
Over the year, the commission finalised 48 complaint assessments and six investigations.
Ten investigations were commenced.
An audit of complaint management by Tasmania Police was delayed in 2018-19 but has since started this financial year.