KFC claims that Church's use of the phrase "original recipe" in its own advertisements "is likely to create confusion in the marketplace.

KFC has sued Church's Texas Chicken, accusing the rival fast-food chain of violating its trademark rights in the phrase "Original Recipe."

In a lawsuit filed Nov. 8 in the U.S. District Court for the Eastern District of Texas, KFC has accused fellow fast-food fried chicken purveyor Church's Texas Chicken of violating its trademark rights by using the phrase "Original Recipe" in its advertisements and promotions.