More than 30% of on-street car parking tickets issued to cars from the Republic of Ireland remain unpaid, it has been revealed.
Ulster Unionist MLA Rosemary Barton unearthed the figures from the Department for Infrastructure and said she intended to question officials on how it follows up on fines for vehicles registered south of the border.
Mrs Barton said: "The figures that I have obtained for unpaid on-street parking tickets issued throughout towns in Northern Ireland provide some interesting statistics.
"One of those figures highlights the fact that 31% of the tickets issued to Republic of Ireland vehicles remain unpaid. This is compared to 11% unpaid that have been issued to UK registered vehicles.
"I will attempt to establish how the Department for Infrastructure follow up unpaid tickets and if they have a mechanism of progressing legal action against those resident in both Northern Ireland and the Republic of Ireland.
"Another interesting figure is that almost 25% of these tickets that were issued in the Derry and Strabane Council area remain unpaid.
"Clearly some of this may be in relation to the large number of visitors from RoI, but other towns that would have a significant number of cross-border visitors, like Newry and Enniskillen, do not have the same level of unpaid parking fines."
Figures showing the number of on-street car parking tickets paid and unpaid from January 2017 to September 2017 show 2,251 tickets issued in Armagh and 325 remaining unpaid.
Ballymena reported 2,133 tickets issued with 326 unpaid, and in Belfast a total of 28,629 tickets were issued and 3,493 have not been paid.
Coleraine had 1,175 tickets issued and 190 were unpaid, whereas in Downpatrick 483 tickets were issued and 58 were not paid.
Cookstown had 823 tickets issued and 90 remained unpaid, and in Larne 37 tickets were not paid out of a total of 371 tickets issued.
Only seven tickets in Kilkeel were not paid out of a total of 108 issued, and at the popular tourist spot Giant's Causeway some 23 tickets remain unpaid out of 134 issued.