绿卡组合卡，正式称为I-766表格就业授权文件（EAD），是由美国公民和移民服务局（USCIS）发放的特殊文件，同时兼具工作许可和旅行证明功能。通常，该文件发放给申请人在进行调整身份程序以获得合法永久居民（绿卡）的过程中。以下是绿卡组合卡的详细解释：

  1. 目的： 绿卡组合卡既可以作为工作许可证，也可以作为旅行证明，适用于某些外国国民，他们已经申请了移民签证，并正在进行调整身份程序以获得绿卡。它允许持有者在他们的永久居民申请仍在审批期间合法工作。
  2. 资格条件： 绿卡组合卡的资格取决于特定的移民签证类别和调整身份申请程序的阶段。通常，已提交I-485表格（申请注册永久居住或调整身份）且符合特定条件的个人符合组合卡的资格。
  3. 工作授权： 持有绿卡组合卡的人可以在美国合法工作。该文件包含一个到期日期，标明个人被授权工作的期限。如果调整身份申请仍在审批期间，务必在到期日期前续签组合卡。
  4. 旅行证明： 组合卡还可以作为旅行证明。它允许持有者在调整身份申请仍在审批期间出国旅行并重新入境美国，而无需额外的签证或旅行许可。但是，在出行前务必注意到期日期，并确保组合卡在出行时有效以供重新入境使用。
  5. 生物特征预约： 申请绿卡组合卡的人通常需要参加生物特征预约，将他们的指纹、照片和签名进行录入。这些信息用于进行背景调查和核实申请人的身份。
  6. 有效期： 绿卡组合卡的有效期取决于调整身份申请的阶段。大多数情况下，组合卡的有效期为一年。然而，如果调整身份申请在一年后仍在审批，可以申请续签以延长有效期。

总之，绿卡组合卡是一份有用的文件，为某些申请人提供了工作许可和旅行能力，同时他们的调整身份申请仍在审批期间。通过将工作和旅行权益合二为一，绿卡组合卡简化了寻求美国合法永久居留的个人的程序。

A Green Card Combo Card, officially known as a Form I-766 Employment Authorization Document (EAD), is a special document issued by the United States Citizenship and Immigration Services (USCIS) that serves both as a work permit and a travel document. It is typically issued to certain categories of applicants who have applied for adjustment of status to become a lawful permanent resident (LPR), also known as obtaining a Green Card. Here is a detailed explanation of the Green Card Combo Card:

  1. Purpose: The Green Card Combo Card serves as both a work permit and a travel document for certain foreign nationals who have applied for an immigrant visa and are in the process of obtaining a Green Card through adjustment of status. It allows the holder to work legally in the U.S. while their application for permanent residency is pending.
  2. Eligibility: Eligibility for the Green Card Combo Card depends on the specific immigrant visa category and the stage of the adjustment of status application process. Generally, individuals who have filed Form I-485, Application to Register Permanent Residence or Adjust Status, and meet certain criteria are eligible for the Combo Card.
  3. Work Authorization: With the Green Card Combo Card, the holder can legally work in the U.S. The document contains an expiration date, which indicates the period during which the individual is authorized to work. It is essential to renew the Combo Card before the expiration date if the adjustment of status application is still pending.
  4. Travel Document: The Combo Card also serves as a travel document. It allows the holder to travel abroad and re-enter the U.S. during the pendency of their adjustment of status application without the need for an additional visa or travel permit. However, it is essential to be mindful of the expiration date and ensure the Combo Card is valid for re-entry before traveling.
  5. Biometrics Appointment: Applicants for the Green Card Combo Card are typically required to attend a biometrics appointment, where their fingerprints, photograph, and signature are taken. This information is used to conduct background checks and verify the applicant’s identity.
  6. Duration of Validity: The validity period of the Green Card Combo Card varies depending on the stage of the adjustment of status application. In most cases, the Combo Card is issued for a period of one year. However, if the adjustment of status application is still pending after one year, it is possible to apply for a renewal to extend the validity.

In conclusion, the Green Card Combo Card is a useful document that provides certain applicants with work authorization and the ability to travel while their adjustment of status application is pending. It simplifies the process for individuals seeking lawful permanent residency in the United States by combining both work and travel benefits into one convenient card.