KENTUCKY Fried Chicken in Blackwood was fined for breaching food hygiene laws.
The restaurant chain in North Court was taken to court and fined following a council investigation which revealed the business practiced poor food hygiene standards.
Environmental health officers carried out an inspection after receiving several customer complaints.
KFC was prosecuted by Caerphilly council after the investigation uncovered several examples of breaches of food safety legislation.
The case was heard at Abergavenny Magistrates Court on Monday.
KFC pleaded guilty to two offences and was ordered to pay a fine of £2,600, £1,300 for each offence, with prosecution costs of £859 and a £15 victim surcharge.
Both offences were contrary to the Food Hygiene (Wales) Regulations 2006 and related to failing to maintain the food business in a clean, well maintained condition, and failing to manage the refuse store in a way that enabled it to be kept clean.
Cllr David Poole, cabinet member for community and leisure services said: "Our team of officers work tirelessly to promote the importance of food businesses complying with food hygiene and associated legislation, but if businesses choose to ignore our advice and do not take appropriate steps to protect the safety of their customers, we will not hesitate to take formal action through the courts, as we have done in this particular case."