A greetings card shop in Wombwell has been served with a prohibition notice by Barnsley Council Regulatory Services officers.
The action follows reports made to the council raising concerns that the “non-essential” business was continuing to operate and allowing customers inside the premises.
Julia Burrows, Barnsley Director of Public Health, said: "I fully recognise that times are tough for businesses – as they are for all of us - but the rules around which businesses can operate during the current lockdown are quite clear.
“The vast majority of Barnsley businesses and residents are making the effort to follow all the rules and guidance, even though it hasn’t been easy, and I thank them for this.
“However, there’s no excuse for failing to follow the rules, we have provided support and information on support grants available to businesses and we will not hesitate to take action on those who do not comply.
"Infection rates need to come down a lot more and breaches like this one where the premises are open and customers are calling in, put staff, customers and the wider public at increased risk.”
Officers have offered advice to the card shop operators on how they can use click and collect and still trade within the regulations.
Businesses can get access to financial support and guidance at https://www.enterprisingbarnsley.co.uk/covid-19-coronavirus/