Since the existing measures to prevent ambush marketing are widely ineffective, sponsors can use countercommunications, a public response to an ambushing attempt that aims to strengthen their own brand, relative to the ambusher. This research examines consumer responses to three types of counterambush marketing ads: humorous complaining, naming and shaming, and consumer education. Three experimental studies using both real and fictitious brands as well as different event settings indicate that a humorous counterad (vs. naming and shaming and consumer education counterads) results in more favorable consumer evaluations of the countermessage. The studies also show that perceptions of the advertising tactic's appropriateness mediate these effects and that a humorous counterad is only advantageous when consumers hold positive (vs. negative) attitudes toward the practice of ambush marketing. In addition, comparing the three types of counterads with a common sponsorship leveraging ad suggests that a humorous counterad and simply ignoring the ambusher produce equal perceptions of tactical appropriateness and similar positive indirect effects on consumer attitudes toward the ad. The studies thus provide implications for how sponsors can respond to ambushers. and 3). In doing so, this research makes the following contributions. First, the study compares the effects of different types of counterambush marketing ads (vs. common sponsorship leveraging; Study 3). While previous research shows that a third-party disclosure of an ambusher (i.e., the media) can decrease consumer attitudes toward the ambushing brand (Mazodier, Quester, & Chandon, 2012), no study has examined a situation where the official sponsor is the source of countercommunications and how consumers respond to these countermessages. This is important because sponsors may not be willing to leave it to the media or the sponsored property to decide whether and how to respond to an ambushing attempt.Second, in the comparison of the three types of counterads, this research considers response variables relating to both the advertising tactic (i.e., perceived tactical appropriateness) and the ad itself (i.e., attitude toward the ad). Thus, the studies provide insights into how the different types of counterads influence consumers' responses. Further, the present research takes into account consumer attitudes toward the practice of ambush marketing-a variable that has been shown to vary across consumers in descriptive studies (Dickson, Naylor, & Phelps, 2015)-as a boundary condition.The remainder of this article is structured as follows: The next section presents the conceptual background for ambush marketing and counterambush marketing communications from the sponsors' perspective. Next, hypotheses are developed for differences in the effects between humorous counterads and name and shame counterads and the results of a first empirical study are presented. The subsequent section extends the theoretical arguments to educational counterads and presents the results of a...