Woolworths is currently under investigation after claims that staff have been secretly collecting personal details from gamblers to keep them playing longer.

The New South Wales gaming regulator said that Liquor and Gaming New South Wales is investigating the allegations as this act is a clear breach of the Responsible Conduct of Gambling.

The investigation began after a whistleblower leaked screenshots of a database used by over 400 pubs profiling regular poker machine users, including entries on favourite beverages and sports teams.