Kim Kardashian's model sister Kendall Jenner has called in her lawyer to deal with a messy spat over an unpaid restaurant bill.

Kardashian's younger half-sister, who has modelled for designers including Givenchy and Marc Jacobs, was accused of leaving the Mercer Kitchen eaterie in New York City without paying, and the waitress claimed the star was rude to her after she tracked her down outside the restaurant.

The reality TV regular's lawyer, Marty Singer, has now written a letter to the waitress involved and threatened her with legal action if she continues to make claims against the model.

The letter, obtained by TMZ.com, reads, "Although you are working as a waitress at Mercer Kitchen, I understand you are also a struggling actress... You no doubt concocted a fictionalised account of your encounter with my client in order to create publicity for yourself."