Kendall Jenner was not thrilled when Mercer Kitchen in New York would not bring her alcohol, as she is underage. The "Keeping up with the Kardashians" star allegedly walked out of the restaurant without paying after a meal with pal Hailey Baldwin.

"The staff wouldn't serve her [booze] because she's underage," an eyewitness told Page Six. "Kendall got up and left and didn't pay for all the food . . . about $60 worth, and without a tip."

Server Blaine Morris, who appeared on MTV's "Skins," had to chase after the model to pay up.

"Kendall and Hailey started laughing," the source continued. "Kendall took a couple of $20 bills out of her wallet, threw them at the server and walked away, not even counting if it was enough or if it included a tip."

After the incident, Morris tweeted, "That horrible moment you chase a Kardashian down the street because she forgot to pay her bill to be thrown money in your face."

Jenner's rep would not comment on the incident, but Baldwin's rep assured, "They thought everything was paid for. Kendall was polite and asked 'Does this cover it?' They didn't run."

Forgetting to pay a restaurant bill seems to run in this family. We told you in June that Kourtney Kardashian failed to leave a tip after dining at Southampton restaurant The Driver's Seat, leaving the staff up in arms.

As far as the tipping incident, a waitress told Page Six that "local servers are hard-working people who support their families and live on tips."

Kardashian's rep denied these claims, saying, "the meal was comped and production left a generous tip. As for the dinner ... no one had a problem signing the release forms."

Do you think Jenner walked out without paying, before throwing money in her server's face? Let us know your thoughts in the comments section below.