Abandoned vehicles are decrepit cars or car wrecks or cars that have become useless in other ways, which are abandoned and illegally dumped in the environment. Abandoned vehicles will be tagged with an official notice when found or reported. Criteria for "abandonment" may differ, and a minimum duration of abandonment in the order of a few days to weeks is required. When reporting such a vehicle, the required data will usually comprise the exact location, the make, colour and type, and - if available and readable - possibly the VIN and the licence plate. Costs for removal will as a rule be taken by public councils.

Illegal dumping, also called fly dumping or fly tipping (UK), is the dumping of waste illegally instead of using an authorised method such as curbside collection or using an authorised rubbish dump. It is the illegal deposit of any waste onto land, including waste dumped or tipped on a site with no licence to accept waste.