Kate Moss has been denied a US work visa until she takes a drugs test to prove she is clean.

The supermodel visited the American Embassy two weeks ago to apply for a work visa fur the US but was told by authorities she would need to prove she was clean by providing them with a urine sample.

A source tells thisislondon.co.uk "Kate came into the Embassy to apply for a working visa. The person put in charge of her case had to tell her point blank that the application couldn't be processed without a drugs test. Its common practice for American officials to deny people with criminal records or a history of drugs entry to the States, but Kate has never been charged so she looked a little stunned.�

The employee then explained that Moss�s case is different because of her high profile and the media interest surrounding the photos of her allegedly snorting cocaine.  "The Embassy employee explained that her case is different because of her notoriety and her cocaine problem was so high profile. Kate accepted this, saying 'OK, I understand' and left the Embassy looking rather dejected, but promised to come back next week."

Kate was spotted checking out apartments in New York last year. The model has work lined up in the US but this may have to be put on hold until the visa comes through.

The Embassy insider confirmed that providing the sample comes back clear, Kate will be treated like any other person. "Once Kate provides a urine sample and it comes back clear then the American embassy will treat her like every other person applying for a visa. Immigration officials haven't put a life ban on her or anything."