St Vincent de Paul Society workers will have an unwelcome surprise when they return to work at the charity's North Wollongong warehouse on Tuesday.
Over the Easter weekend, items including an old lounge suite, a discarded desk chair and unwanted children's toys were left strewn across the Montague Street site's lawn.
Dumping continues to be a "major problem" for the St Vincent de Paul Society, according to its website, which says unusable items have to be taken to the tip and disposed of at a "considerable expense".
Wollongong City Council addresses the issue in its Waste Wise Guide, advising people it is illegal to place any item outside a charity bin.
"Don't dump on a charity - make sure items are reusable, resaleable, clean, unsoiled and in working condition," it states. "It is illegal dumping to place any item outside a charity bin."