A novel and facile process for direct fluorination of unactivated C(sp3)鈥揌 bonds at the 尾 position of carboxylic acids was accomplished by a palladium(II)-catalyzed C鈥揌 activation. The addition of Ag2O and pivalic acid was found to be crucial for the success of this transformation. This reaction provides a versatile strategy for the synthesis of 尾-fluorinated carboxylic acids.