A blitz on unlicensed pub and club doorstaff will take place throughout December, the Security Industry Authority (SIA) has announced.
The SIA has promised a series of weekend checks at licensed premises during the run-up to the busy Christmas and New Year period.
SIA investigators will join regional police forces, licensing officers and local authorities as part of the national Responsible Alcohol Sales Campaign, which is targeting underage sales and sales to people who are drunk.
Jackie Munn, SIA head of investigation who is leading "Operation Festive Spice", said: "We will be working closely with our police partners, local authorities and the licensed trade in the busy time leading up to Christmas and the New Year.
The multi-agency visits are a clear demonstration that everyone working together can make a positive contribution to public safety.
"We want to ensure that the many people who go out during this period can do so, knowing that door staff, who play a key role in dealing with alcohol related crime and disorder are, trained, qualified and SIA licensed.
"Door staff working without an SIA licence, and those deploying them, are committing an offence and licensees risk having their premises closed."
Pubs risk six months in prison and a fine of up to £5,000 for hiring unlicensed doorstaff.