Rapper 50 Cent is suing fast-food giant Taco Bell over the unauthorized use of his name in an ad campaign asking him to call himself 79 Cent, 89 Cent or 99 Cent.

Taco Bell’s “Why Pay More?” campaign promotes products which cost less than $1: Cinnamon Twists for 79 cents, Crunchy Tacos for 89 cents or Bean Burritos for 99 cents.

A print add show the rapper, whose real name is Curtis Jackson, asking to change his name to 79 Cent, 89 Cent or 99 Cent.

While the ad may be funny, 50 Cent is not amused. Papers filed Wednesday in Manhattan federal court accuse Taco Bell of “diluting the value of his good name,” as quoted by Reuters and of misleading consumers into thinking he endorsed the campaign.

50 Cent however was not told of the company’s advertising plans and he did not authorize the campaign nor did he receive any compensation.

“Without seeking or obtaining Jackson’s authorization, defendant Taco Bell made him the star and focus of its nationwide advertising campaign by using his name, persona and trademark to promote Taco Bell's business and products,” court papers said.

The lawsuit further accuses the Mexican-style fast-food chain of sending a letter, addressed to 50 Cent and requesting him to change his name to 79 Cent, 89 Cent or 99 Cent, to the news media

The letter was sent only afterwards to the rapper, the lawsuit adds.

Taco Bell Corp. has responded to 50 Cent’s lawsuit through a statement issued by spokesperson Rob Poetsch, explaining that the company made a “good faith, charitable offer” to 50 Cent, inviting him to participate in the ad campaign and donate $10,000 in exchange to the charity of his choice.

50 Cent has sued before over unauthorized use of his name and image. It was only last year that he filed a $1 million lawsuit against an Internet ad company which he accused of using his image without permission in a game called “Shoot the Rapper,” which invited players to shoot him.

The rapper’s lawyer, Peter D. Raymond, said his client is seeking about $4 million in damages from Taco Bell.