<p>According to the needs-based model of reconciliation, empowerment, and acceptance are crucial for intergroup reconciliation. However, third-party empowerment and acceptance cannot play a similar role due to the lack of trust. Therefore, increasing trust between opposing groups through a third party is likely necessary for third-party reconciliation interventions. Based on the dual-identity model, we assume that dual-identity reminders (messages that remind groups of their common identity while retaining their unique group identity) may provide acceptance while promoting intergroup trust, thereby promoting reconciliation. The results of three studies demonstrate that the dual-identity reminder messages effectively promote reconciliation, irrespective of whether it originates from the conflict opponent or a neutral third party. Despite the message steadily conveying acceptance, when it comes from a third party, it primarily affects the willingness to reconcile by increasing trust. Furthermore, different patterns of the effect emerge for victimized and perpetrating groups. For victimized groups, dual-identity reminders contribute steadily to their willingness to reconcile through trust. For perpetrating groups, the role of trust is no longer evident and the role of acceptance may vary across different conflict contexts. Overall, this research presents a promising third-party reconciliation intervention and emphasizes the crucial role of trust and conditional acceptance in the process, thereby providing a theoretical foundation for further refining related strategies.</p>