留学生出境旅行先约旅行签名：要提前两到四周向学校DSO申请
美国国土安全部面向留学生的官方平台 Study in the States 在2026年8月17日发布的开学准备提醒中说，打算出境旅行的留学生，要确认自己的 I-20 表格是最新的，并至少提前两到四周向学校指定校方官员（DSO）申请旅行签名。签名不等人，临出发才办是最常见的被动。
这份提醒还点出一项已经生效的新规：国土安全部2026年7月17日发布了为 F 类学生等非移民设立固定入境期限和延期程序的最终规则，规则已于2026年9月15日生效。平台建议学生和 DSO 都去看这项规则的速览页面，弄清它对 F 类学生的影响。
开学前的基本功也在提醒里：抵达美国后联系 DSO；联系方式有变化，包括邮箱、电话和住址，尽快报给 DSO，并留一个自己常看的邮箱；每学期修满全日制课程，想退课或减课先和 DSO 谈；护照、I-20 和签证要保持有效、妥善保管并留复印件；想打工必须先走工作授权流程，拿到授权前不要接受任何工作。
学校一侧的时限同样明确：DSO 要在每期开学后30天内完成 SEVIS 注册，学生信息有变化时要在21天内更新 SEVIS 记录，并核对每名学生的项目结束日期是否准确。学生有疑问，第一联系人始终是本校 DSO。（来源：国土安全部Study in the States）
Planning to Travel Abroad? International Students Should Request a Travel Signature Two to Four Weeks Ahead
International students who intend to travel outside the United States should confirm their Form I-20 is up to date and request travel signatures from their designated school official (DSO) at least two to four weeks before traveling, the U.S. Department of Homeland Security's Study in the States platform said in back-to-school guidance published August 17, 2026.
The guidance also flags a rule change already in effect: on July 17, 2026, DHS published a final rule establishing a fixed time period of admission and an extension of stay procedure for F students and other nonimmigrants, and the rule took effect on September 15, 2026. Students and DSOs are directed to the rule's quick facts page to understand how the changes may affect F students.
The start-of-term basics are listed as well: contact the DSO after arriving in the United States; report changes in email, phone and physical or mailing address as soon as possible, with an email address that is regularly monitored; enroll in a full course of study each term and speak with the DSO before dropping a class or reducing a course load; keep passport, Form I-20 and visa valid, stored securely with copies made; and follow the work authorization process and obtain authorization before accepting any employment.
Deadlines bind the school side too: DSOs must complete SEVIS registration no later than 30 days after the start of a school session and update school and student records in SEVIS within 21 days of a change in information, while confirming each student's program end date is accurate. For questions, the DSO remains the student's main resource. (Source: Study in the States, U.S. Department of Homeland Security)
来源：国土安全部Study in the States
发布：GSM·美国（发布链接）
图片来源：图：大学生在校园里行走。Wikimedia Commons 图片。 / Photo: Students walking through a university campus. Image via Wikimedia Commons.
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