Craigslist bosses removed the ads from several city websites following Siriano's complaints, but a new posting appeared again last month (Jul10), which asked models for a $150 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!"