It's been suggested that fines are no longer putting people off littering in Dublin.
Figures from the City Council show three out of every five litter fines remain unpaid.
Over the past five years, close to 7,500 litter fines have been issued by Dublin City Council but just 40% of these have been paid.
So far this year only 158 of the 451 fines issued across Dublin have been collected.
Fianna Fáil's Dublin Spokesperson, TD John Lahart, said leaving the fines uncollected is an "exceptionally weak message to be sending to the public".
"There is little point in issuing fines for litter if authorities are not stringently following up on their payment", he said.
He has called for stricter enforcement of Local Authority litter bye-laws to help clamp down on fly tipping, and the improper disposal of general household waste.