二次诈骗是一种诈骗手法，指的是诈骗集团锁定先前曾受骗之被害人，假称为警方、检察官、银行人员、骇客等身份，对被害人声称可帮其追回遭骗款项（或已追回遭骗款项）、但必须要依指示进行一系列操作（通常是以收取手续费、保证金等各种名义要求汇款），利用被害人急于追回遭骗款项之心理，而骗取其钱财[1][2][3][4]。
参考文献
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