A transit van driver was fined after being spotted throwing a bag of rubbish out of the window by a member of the public.
The vigilant resident took down the details of the driver, who was driving along on Welton Road, near Daventry, one evening in June.
They reported the matter to Daventry District Council, which tracked down the motorist and issued a £50 Fixed Penalty Notice.
Daventry District Council (DDC) is publicising the case to encourage community-spirited people who see motorists throwing litter from their vehicles to take swift action to help catch the offenders.
During 2013/14 the council issued 61 fixed penalty notices for littering offences, which included a number of cases of people throwing litter out of vehicles.
As part of the Clean up My Community Campaign, people who see littering taking place from vehicles are being encouraged to report it to DDC, either online at www.daventrydc.gov.uk/online or by calling 01327 871100.
Residents are encouraged to write down details on time, date and location, description of the driver and vehicle involved, including registration number, along with a brief account of what they witnessed.
Information could be recorded on a mobile phone if pen and paper is not available and if they are driving, a passenger should record the details or the driver should wait until they have finished their journey.
A handy environmental crime reporting booklet, which includes a checklist of details required, is available to download at www.daventrydc.gov.uk/cleanupmycommunity
Councillor Richard Atterbury, said: “Dropping litter is unacceptable in any circumstances, and throwing it from a moving vehicle is no exception.
“People who do so should be aware that they can still be tracked down and fined or even prosecuted for their actions.
“With the location of our district at the heart of the national road network and major highways such as the M1, A14 and A45 running through our area, it’s important we all do what we can to tackle this kind of littering.
“I would encourage anyone who spots rubbish being thrown by motorists or dumped at the roadside to record the details and get in touch with us so we can take action.”