If any staff member or guest is approached by anyone in plain-clothes, claiming to be police, they should call police immediately if not satisfied that the correct Warrant Card has been produced.. If they are legitimate police officers, they will understand and will be more than willing to wait while their credentials are checked. If they are not, they are more than likely to leave the scene immediately. Please still report this attempt to police, noting anything descriptive that you can. Should officers attend your venue, again, you can always call police to check their identities. Always look at the warrant card until satisfied.