一句话核心总结 (TL;DR)：在办理美国绿卡（I-485 调整身份或境外移民签证）时，如果曾有组织成员身份、身份挂靠、签证身份过期、或被怀疑欺诈等"不可入境"（inadmissibility）问题，往往可以通过申请 I-601 不可入境豁免（Application for Waiver of Grounds of Inadmissibility）来解决。新未名律所过去几年已帮助 70 多位申请人成功取得 I-601 豁免批准。I-601 可豁免的事由远不止常见的 DY（多元化签证欺诈）、TY（陈述虚假）和身份挂靠，还涵盖：某些传染病、因宗教/信仰原因拒绝疫苗、可能危害他人的精神健康问题、道德败坏类犯罪（诈骗/伪造文件/严重家暴等）、违禁药物违规、曾被法院定罪、卖淫相关行为、移民或签证过程中造假、协助他人非法越境、非法居留超过 180 天、被递解出境后再次入境等。重要例外："在美国未经许可工作"本身不能用 I-601 豁免，但可能符合 245(k) 的例外规定，或作为美国公民的配偶/成年美国公民的父母获得豁免。当前政策收紧的现实：有美国亲属、有 Hardship（极端困难）证据、不威胁美国安全，这些只是基本条件、必要条件，而非充分条件——申请人还需具体说明豁免理由、过往事实经过及一切有利因素（与美国的联系、亲属需要、雇主同事朋友支持、对过往违法行为的检讨说明、客观书面证据，并可引述相关判例）。

TL;DR (English): When applying for a U.S. green card (Form I-485 adjustment of status or an immigrant visa abroad), past issues such as organizational membership, status "anchoring," visa overstay, or suspected fraud can often be resolved through the I-601 Application for Waiver of Grounds of Inadmissibility. New Weiming Law Group has helped 70+ applicants win I-601 approvals in recent years. Beyond common grounds like diversity-visa fraud, willful misrepresentation, and status anchoring, an I-601 can address: certain communicable diseases; vaccine refusal on religious or personal-belief grounds; mental-health conditions posing a threat to others; crimes involving moral turpitude (fraud, document forgery, serious domestic violence); controlled-substance violations; prior court convictions; prostitution-related conduct; fraud in the immigration or visa process; alien smuggling; unlawful presence over 180 days; and re-entry after removal. Key exception: unauthorized employment in the U.S. cannot be waived via I-601 but may qualify under the 245(k) exception or through the immediate-relative route. Current reality: with tightened policy, having U.S. relatives, hardship evidence, and no security threat are necessary but not sufficient — the applicant must also explain the waiver rationale, the underlying facts, and all favorable factors with objective documentary evidence and relevant case citations.