The UK government is warning aspiring models and entertainers to be on their guard against rogue casting agencies who try to relieve them of their money on the false promise of fame.

The Department of Trade and Industry (DTI) has published advice to help would-be entertainers and models ensure that they work with reputable agencies.

The move follows several cases where agencies have advertised casting sessions in local newspapers, then used hard-sell tactics to take payments from candidates on promises of success and stardom.

In particular, aspiring entertainers are warned to be wary of agencies trying to persuade them to pay fees on the day for including the candidate's details in a publication.

The information campaign comes as the DTI opens a consultation on new measures to protect vulnerable agency workers.

"Beware of anyone who promises to make you a star overnight," said Employment Minister Jim Fitzpatrick.

"If it looks too good to be true, then it probably is. Our advice is designed to help stop rogues turning people's dreams into nightmares."

The DTI recommends: Never sign anything on the day, especially if you are being pressured. Reputable agencies let you take paperwork away to study at your leisure.

• Check out the agency before signing anything; look at their website, ask about the percentage of their clients in regular work, ask them for references from recent clients.

•Beware of adverts claiming to provide artists for popular TV programmes like East Enders or Dr Who - directors for these shows usually use agencies and individuals they have used before.

• Rogues will tell you what you want to hear - "You are just what we are looking for" - so you sign up and pay unnecessary or excessive fees.

• Reputable agencies will tell you that only a very small number of people have what it takes to succeed.