A Taiwanese tourist visited Fergburger on Sunday and was shocked when she saw the server had written a slur about Asian people on the receipt.
Fergburger has since contacted the tourist, who has been offered a formal apology and been given regular updates throughout the company's internal investigation into the matter.
In a statement released this afternoon, Fergburger said the employee involved in the incident had been dismissed for their "unjustified behaviour".
"While this cannot undo the incident or lessen the harm caused, Fergburger remains committed to addressing the situation thoroughly," the statement read.
"This incident has been caused by a single individual whose actions are entirely inconsistent with Ferg’s values.
"Our team is made up of employees from over 37 different countries, and we have always taken pride in fostering a warm and inclusive environment.
"In our 24 years of operation and through the employment of 3,500 staff, we have never experienced an incident of this nature."
The tourist, who did not want to be named, shared the receipt on social media and contacted local tour guide Roxie Fu, co-owner of Mini Tours.
Ms Fu told the Otago Daily Times "the staff in Fergburger did not ask for the girl’s name, relying on calling out the number on the receipt to let her know the order was ready.
"The tourist was shocked and disheartened when she saw what had been used for her name."
Originally from Hong Kong, Ms Fu said: "It is a shock to see this behaviour from such a famous company, I would say one that represents Queenstown globally.
"The comment was unnecessary and I am shocked it has happened in New Zealand - especially in Queenstown, being such a tourist friendly place."
Claire Burke, group general manager for Ferg Foods, said in an earlier statement: "Fergburger acknowledges and deeply regrets a recent incident involving inappropriate and insensitive labelling on a customer order.
"We extend our sincere apologies to the customer affected and to anyone else who may have been hurt or offended.
"We take this matter extremely seriously and are committed to ensuring that no customer experiences such behaviour again - we are grateful for the feedback that allows us to address issues promptly and improve our practices."
Ms Burke said "the behaviour displayed in this incident is completely unacceptable and does not reflect the values we uphold.
"After learning about the incident, an internal investigation has been launched to further understand it and ensure accountability."
To prevent similar incidents in the future, the company would be implementing additional cultural sensitivity and inclusivity training for all team members.
The popular fast food restaurant in central Queenstown often has wait times hours long, and has had many famous visitors including Ed Sheeran, Justin Bieber and Sir Peter Jackson.
