Rugby Borough Council's environmental health and community safety team launched an investigation after CCTV captured footage of a lorry making a delivery to Kwahu Supermarket and - once unloaded - a man and a woman carrying cardboard, shrink wrap and pallets, who piled the rubbish next to a litter bin opposite the High Street store.
Following the footage recorded on 20 October 2022, a further dozen fly-tipping incidents were caught on camera during the following month.
The investigation confirmed Albert Writer and Samuel Owusu were both sundry debtors to the business rates account for the supermarket and both had given the same property in Coventry's Foleshill Road as the billing address.
After confirming the supermarket had no contract in place with the council for the collection of commercial waste, an environmental health officer wrote to both Mr Writer and Mr Owusu - prompting Writer to call the council and confirm he was the store's manager.
Invited to interview under caution, Writer again confirmed he was responsible for the running of the supermarket.
He said waste from the store should have been stored on the premises before being collected by a registered waste disposal firm.
Writer admitted failing to instruct the woman caught on camera fly-tipping on 20 October 2022 how the store disposed of waste and also failed to produce waste transfer notes to demonstrate the supermarket's rubbish was disposed of legally, despite the council requesting copies of the notes.
But at Coventry Magistrates Court, Writer pleaded not guilty to 13 charges of fly-tipping and a charge of failing to produce waste transfer notes.
Writer told the court he was merely helping his friend, Mr Owusu, by working at the supermarket and had referred to himself as the 'manager' as a cultural term for 'helping out' - despite evidence showing he was a leaseholder of the supermarket and was responsible for paying its business rates.
Magistrates found Writer guilty of all charges at the hearing on Tuesday 11 February and fined him £700 for the fly-tipping offence committed on 20 October 2022.
No separate penalty was imposed for the other 12 fly-tipping offences and the failure to produce waste transfer notes.
Magistrates also ordered Writer to pay a victim surcharge of £280 and the council's costs - £1,500.
Speaking after the hearing, Cllr Claire Edwards, Rugby Borough Council portfolio holder for communities and homes, regulation and safety, said: "Fly-tipping costs our taxpayers tens of thousands of pounds a year and causes untold damage to the environment.
"The council operates a zero-tolerance policy on fly-tipping and we investigate all reported incidents.
"When we find evidence to trace the culprit, we can take legal action, from issuing fixed penalty notices to taking the case to court, so I'd encourage all residents to report incidents to us and support our work to crackdown on fly-tipping."
For more information on fly-tipping - and to report incidents - visit www.rugby.gov.uk/fly-tipping