Almost 2,200 litter complaints were made to Roscommon County Council in four years - but only 209 fines were issued.
The new figures relate to the period between 2021 and 2024.
570 complaints were made last year, with 57 fines issued - and only two thirds of them were paid.
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Greg O'Donnell, from the council's environment section, says they try hard to punish those responsible for littering.