Executives at Siriano's fashion label began receiving enquiries from modelling hopefuls last February (10) after fake ads posted to online listings service Craigslist.org hit the web, according to his rep Bianca Bianconi.
Craigslist bosses removed the ads from several U.S. city websites following Siriano's complaints, but a new posting appeared again last month (Jul10), which asked models for a $150 (£100) application fee to work for the designer.
Fashionista.com reports Siriano's company has alerted Craigslist bosses to the con once again, and now New York City police are investigating the matter.
Meanwhile, the designer has logged onto his Facebook and Twitter.com pages to warn potential victims of the scam.
He writes: "fyi (for your information) girls i have never and do not ever look for models on craigslist or online. these photo shoots i'm hearing about are scams! be careful!"