This paper examines the impact of misleading postevent information on individuals’ memory recall of witnessed events through five experiments. Utilizing the modified opposition test to assess memory, the study finds that retrieval blocking can occur irrespective of whether misleading information is presented before or after the event. The results also indicate that while individuals can mitigate retrieval-blocking effects when warned about misinformation, this ability is contingent on the misinformation’s accessibility level, leading to discussions around the retrieval-blocking hypothesis and potential suppression mechanisms.