Sniffer dogs and Trading Standards officers will be out in Port Talbot talking to the public about the sale of illegal tobacco in their communities.
It's a part of an international day of action marking World No Tobacco Day.
Anti-smoking charity, Ash Cymru, say illegal tobacco makes it easier for children to start smoking.
This follows an ITV Cymru Wales investigation that found illegal tobacco made up 15% of all sales in Wales and that it was being sold for as little as £3.
The event is being hosted by Neath Port Talbot County Council and members of the public will have the opportunity to meet sniffer dogs and report to sales of illegal tobacco in their community to police.
Cigarettes and hand rolling tobacco are classed as illegal if they've either been smuggled into the country, bought abroad as 'duty free' and avoided UK taxes, or are counterfeit products made to look like big name brands.
The sale of illegal tobacco has been linked to money laundering, modern slavery and child exploitation.
Watch the sniffer dogs demonstrate their ability to detect some illegal tobacco which had been planted in ITV earlier: