Research in the aggression domain has been mixed regarding the effectiveness of using mitigating information (e.g., excuses, apologies) to reduce aggressive behavior after a provocation. Aggression theory (e.g., general aggression model) posits that mitigating information may cues re‐appraisal processes to potentially change aggressive behavior. If re‐appraisal processes are engaged, aggressive behavior is likely to decrease. Currently, no published study has synthesized the literature to test such theoretical claims. The current study used meta‐analysis to test this effect and examine the influence of several possible moderators. Results showed a significant negative effect size, suggesting that mitigating information does indeed reduce aggressive behavior after a provocation. However, these results were qualified by several significant moderators. Results showed that mitigating information reduces aggression when (a) the information did not come from an apology, (b) the non‐apologetic mitigating information was high quality, and c) the provocation was mild (vs. strong). Theoretical extensions are discussed. Aggr. Behav. 9999:XX–XX, 2013. © 2013 Wiley Periodicals, Inc.