McDonald's in the US is being taken to court for not charging a discount when customers request a burger without cheese.
Two Florida fans of the fast-food giant have sued for US$5 million, Fox News reports.
They claim while cheeseburgers are more expensive than hamburgers, other menu items - such as a Quarter Pounder - cost the same whether they have cheese or not.
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The lawsuit, which they hope will be granted class-action status, notes McDonald's used to charge less for cheese-less Quarter Pounders. But recently, "customers have been forced, and continue to be overcharged for these products, by being forced to pay for two slices of cheese, which they do not want, order or receive, to be able to purchase their desired product".
"McDonald's is being unjustly enriched by these practices because it receives payment for cheese it does not deliver to its customers."
McDonald's says the lawsuit has no merit.
"The advertised Quarter Pounder burger comes with cheese," the corporation told USA Today. "We try to accommodate our customers' requests by allowing them to customise their orders, such as a Quarter Pounder with no cheese."
It said franchisee owners set their own prices.