📚 The CAS for UK Student Visas: Why the Confirmation of Acceptance for Studies Is Step One | 英国学生签证的 CAS：录取确认函为什么是申请第一步
Applying to study in the UK looks like a long list of tasks: choosing a course, taking an English test, gathering bank statements, booking a biometrics appointment, packing. But these tasks are not a random pile - they run in a fixed order, and one document sits at the very front of the queue. That document is the Confirmation of Acceptance for Studies, almost always shortened to CAS. Until a licensed UK sponsor has created a CAS for you, the online visa form will not even let you reach the payment page, because the form asks for your CAS number in its first few screens.
去英国留学看起来像一长串任务清单：选课、考语言、准备银行流水、预约生物信息采集、收拾行李。但这些任务并不是随机的堆叠，它们有固定的先后顺序，而排在最前面的只有一份文件——录取确认函，通常简称 CAS。在英国的持牌担保机构为你创建 CAS 之前，签证在线申请表甚至不会让你走到付款页面，因为表格最前面的几页就会要求你填写 CAS 号码。
1. What Exactly Is a CAS? | CAS 到底是什么？
A CAS is not a letter in the traditional sense, and it is not a certificate you can frame. It is an electronic record created by your university inside the Home Office Sponsor Management System (SMS). The record holds a unique alphanumeric reference, and that reference is what you type into your Student route visa application. The university may email you a PDF called a "CAS statement", but the PDF is only a summary of the record that already exists on the government system.
CAS 并不是传统意义上的信件，也不是一张可以装裱的证书。它是你的大学在英国签证与移民局（Home Office）的担保机构管理系统（SMS）中创建的一条电子记录。这条记录带有一个唯一的字母数字编号，而你要把这个编号填进学生签证申请表。学校可能会通过邮件发给你一份叫 "CAS statement" 的 PDF，但那份 PDF 只是对政府系统里已有记录的摘要说明。
Three features matter for your planning. First, a CAS is personal: it belongs to one named student with one passport number. Second, it is course-specific: it names the exact programme, level, start date and end date. Third, it is single-use: it supports one visa application and cannot be transferred to a friend, a sibling or a different course.
有三个特点对你的规划很重要。第一，CAS 是实名的：它只属于某一位学生、对应一个护照号码。第二，它绑定课程：上面写明了具体的项目名称、课程级别、开学日期和结课日期。第三，它是一次性的：它只支持一次签证申请，不能转让给朋友、兄弟姐妹，也不能换到另一门课程上。
2. Why the CAS Comes First: The Points-Based Logic | 为什么 CAS 是第一步：积分制逻辑
The UK Student route is a points-based system, and the numbers explain the order of operations perfectly. You need 70 points in total. Fifty of those points come from the CAS itself, because the CAS is the evidence that a licensed sponsor has offered you a place on a genuine course. The remaining 20 points are split between your money and your English.
英国学生签证路线实行积分制，而这些数字恰好解释了办事顺序。你需要总共 70 分。其中 50 分直接来自 CAS，因为 CAS 就是"持牌担保机构已为你提供正规课程名额"的证据。剩下的 20 分则分给资金和英语两部分。
| Requirement | 要求 | Points | 分值 | Evidence | 证明材料 |
|---|---|---|
| Course / sponsorship | 课程与担保 | 50 | CAS from a licensed sponsor | 持牌担保机构签发的 CAS |
| Financial requirement | 资金要求 | 10 | Bank statements or official sponsor letter | 银行流水或官方资助函 |
| English language requirement | 英语语言要求 | 10 | SELT or an accepted qualification | 安全英语测试或受认可的学历 |
50 + 10 + 10 = 70 points
Notice what this means in practice. The English test and the bank statements are documents you can prepare independently, but the largest block of points cannot be manufactured by you at all - it must be granted by the sponsor. That is why the CAS is genuinely the first step rather than a formality near the end. It unlocks the application; nothing else does.
请注意这在实践中意味着什么。语言成绩和银行流水是你可以独立准备的材料，但占比最大的那一块分数，你自己完全无法"制造"——它必须由担保机构授予。这就是 CAS 真的是第一步、而不是流程末尾一道手续的原因：它打开了申请的大门，其他材料做不到这一点。
3. Who Issues the CAS and When | 谁签发 CAS，什么时候签发
Only an institution holding a sponsor licence can assign a CAS. Before you accept any offer, check the institution on the GOV.UK register of licensed sponsors and confirm that its licence covers the course level you are applying for. If a provider is not on that register, no CAS can exist, and no Student route application can succeed.
只有持有担保牌照的院校才能签发 CAS。在接受任何录取之前，请先在 GOV.UK 的持牌担保机构名录上查询该校，并确认其牌照覆盖你所申请的课程级别。如果一所机构不在名录上，就不可能有 CAS，学生签证申请也不可能成功。
In terms of timing, most universities open CAS requests several months before the course begins and issue the record once your academic conditions are met and any deposit has cleared. Peak season runs from June to September, and processing inside the admissions office can take anywhere from a few days to three or four weeks. Most institutions will not assign a CAS until your offer is unconditional in academic terms, although a small number will proceed while a final transcript or a deposit is still outstanding. Always read your own university's CAS policy page rather than assuming a general rule.
在时间安排上，大多数大学会在开学前几个月开放 CAS 申请，并在你的学术条件满足、押金到账之后签发记录。高峰期集中在 6 月到 9 月，招生办内部的处理时间从几天到三四周不等。多数院校要求你的录取在学术上转为无条件后才会签发 CAS，但也有少数学校会在最终成绩单或押金尚未到位时就先行处理。请务必阅读你所在学校自己的 CAS 政策页面，而不要套用一般规则。
One useful fact: licensed sponsors are not permitted to charge a fee for assigning a CAS. A tuition deposit is a payment towards your course, not a payment for the CAS itself. If an agent asks you for a separate "CAS fee", ask the university directly.
有一个实用的小知识点：持牌担保机构不得就签发 CAS 收取费用。学费押金是用于课程的费用，不是购买 CAS 的费用。如果有中介向你收取单独的 "CAS 费用"，请直接向学校核实。
4. What Is Inside a CAS | CAS 里包含哪些信息
A CAS record contains the information a visa caseworker will test your application against. If your evidence contradicts the CAS, the caseworker follows the CAS, and the application can be refused. The main fields are shown below.
CAS 记录里包含的内容，正是签证审核官用来核对你申请的依据。如果你的材料与 CAS 相矛盾，审核官会以 CAS 为准，申请就可能被拒。主要字段如下。
- Personal details | 个人信息: full name as written in your passport, date of birth, nationality, passport number.
- Sponsor details | 担保机构信息: institution name, sponsor licence number, campus address.
- Course details | 课程信息: exact course title, level (for example RQF 6 or RQF 7), start date, end date, mode of study, study location.
- Academic history | 学术背景: the qualifications the sponsor relied on when admitting you, plus the English language evidence accepted.
- Money on the record | 费用信息: tuition fees for the first year, and any deposit already paid.
- Other requirements | 其他要求: for some postgraduate science and engineering courses, an ATAS certificate reference.
- The CAS number | CAS 编号: the unique reference that unlocks your visa application.
Every one of these fields is checkable. If the CAS says your name is "Li, Wei" and your passport says "Wei Li", a mismatch exists, and a mismatch of this kind is one of the most common and most avoidable causes of delay.
以上每一个字段都是可以核对的。如果 CAS 上写的是 "Li, Wei" 而护照上写的是 "Wei Li"，就出现了不一致，而这类不一致正是最常见、也最容易被避免的延误原因之一。
5. CAS, Offer Letter and Unconditional Offer: Three Different Things | CAS、录取通知书与无条件录取：三件不同的事
Students often blur these three documents together, which is why so much confusion arises in June and July. An offer letter is an academic decision made by an admissions tutor. An unconditional offer means the academic conditions have all been satisfied. A CAS is a legal immigration record created by the sponsor and registered with the Home Office. Only the third one is a visa document.
学生常常把这三份文件混为一谈，这也是每年六七月间大量混乱的根源。录取通知书（offer letter）是招生导师做出的学术决定。无条件录取意味着所有学术条件都已满足。CAS 则是担保机构创建并向英国内政部登记的法定移民记录。只有第三项才是签证文件。
| Document | 文件 | Issued by | 签发方 | Purpose | 用途 |
|---|---|---|
| Offer letter | 录取通知书 | Admissions office | 招生办 | Academic decision | 学术决定 |
| Unconditional offer | 无条件录取 | Admissions office | 招生办 | Confirms conditions met | 确认条件已满足 |
| CAS | 录取确认函 | Licensed sponsor, via SMS | 持牌担保机构，经 SMS 系统 | Immigration sponsorship evidence | 移民担保证据 |
A CAS is also not a visa. It is the reason you are allowed to apply for one. Holding a CAS gives you no right to enter or remain in the UK; only the visa vignette in your passport or your digital immigration status does that. Equally, an offer letter on its own will never get you through a border checkpoint.
CAS 也不等于签证。它只是你被允许申请签证的理由。持有 CAS 并不赋予你入境或居留英国的权利；只有护照上的签证贴纸或你的电子移民身份才具备这个效力。同样地，单凭录取通知书也绝不可能让你通过边境检查。
6. How to Request Your CAS | 如何申请 CAS
Requesting a CAS is an administrative process with its own requirements, and missing one item can push you back by weeks. Most universities ask you to submit the request through a student portal, and most require at least the following items before they will assign the record.
申请 CAS 是一个有自身要求的行政流程，漏掉任何一项都可能让你倒退好几周。多数大学要求你通过学生门户提交申请，并且通常至少需要以下材料才会签发记录。
- Accepted offer, with all academic conditions satisfied | 已接受录取，且所有学术条件已满足
- Payment of the tuition deposit, where required | 按要求缴纳学费押金
- A clear scan of the passport bio-data page | 清晰的护照资料页扫描件
- Final transcripts and degree certificates | 最终成绩单与学位证书
- English language test result, if the offer was conditional on it | 英语考试成绩（若录取以此为条件）
- ATAS certificate, if your course subject requires it | ATAS 证书（若你的专业要求）
- Completed CAS request form and current contact details | 填好的 CAS 申请表与最新联系方式
A practical rule: do not book a visa appointment, and certainly do not book flights, before the CAS number is in your hands. Every year thousands of students lose money on non-refundable bookings made in the gap between "almost finished" and "actually issued".
一条实用原则：在 CAS 编号到手之前，不要预约签证时间，更不要订机票。每年都有成千上万的学生在"几乎完成"和"真正签发"之间的空档里，为非退款预订白白损失金钱。
7. Check Every Detail Before You Apply | 申请前逐项核对
The single best habit you can build is a five-minute proofread that compares the CAS statement line by line with your passport and your financial documents. Visa caseworkers do not have discretion to ignore an inconsistency; the rules are mechanical, and a refusal caused by a typo is entirely avoidable.
你能养成的最有价值的习惯，就是花五分钟逐行对照 CAS 说明、护照和资金文件。签证审核官没有忽略不一致之处的裁量权，规则是机械执行的，而由拼写错误导致的拒签完全是可以避免的。
Check the following with particular care. Your name spelling and order must match the passport exactly, including middle names and any hyphens. The passport number must be current, not an old document you have since renewed. The course start and end dates should reflect your real intake, especially if you deferred. The tuition figure on the CAS should match the fee you are declaring in your financial evidence. The qualification listed as your entry route must be one you actually hold.
请特别仔细核对以下几点。姓名拼写和顺序必须与护照完全一致，包括中间名和连字符。护照号码必须是当前有效的，而不是你已经换掉的旧护照。课程起止日期要反映你真实的入学批次，尤其是在你延期之后。CAS 上的学费数额应与你资金证明中申报的金额一致。列为入学依据的学历必须是你确实持有的学历。
If you find an error, contact the sponsor's visa or compliance team immediately. Only the sponsor can amend or replace the record. Never attempt to "explain" a discrepancy in a cover letter when the underlying record is simply wrong.
如果发现错误，请立刻联系学校的签证或合规团队。只有担保机构才能修改或更换该记录。当记录本身就是错的，千万不要试图在解释信里"说明"这个差异。
8. Conditional Offers, Deposits and Pre-sessional CAS | 有条件录取、押金与语言课 CAS
If your English score is slightly below the entry requirement, you may be offered a pre-sessional English course. This creates a choice between two CAS structures, and the choice genuinely changes your visa experience for the whole degree.
如果你的语言成绩略低于入学要求，学校可能会让你先读语言班。这时会出现两种 CAS 结构的选择，而这个选择会实实在在影响你整个学位期间的签证体验。
| Structure | 结构 | What it covers | 覆盖范围 | Practical effect | 实际影响 |
|---|---|---|
| Combined or integrated CAS | 合并 CAS | Pre-sessional plus main degree in one record | 语言班与主课合并在一条记录中 | One visa covering the whole period; no in-country extension | 一张签证覆盖全程；无需在英国境内续签 |
| Separate CAS | 分开的 CAS | Pre-sessional only | 仅覆盖语言班 | Must apply again in the UK before the degree starts | 学位开课前必须在英国境内再次申请 |
A combined CAS is usually preferable because it removes a second application, a second fee and a second wait. It is normally issued only when the sponsor is confident you will progress, so the offer structure and your test result both matter.
合并 CAS 通常更可取，因为它省去了第二次申请、第二笔费用和第二次等待。它一般只在担保机构确信你能顺利升学时才会签发，因此录取结构和你最终的考试成绩都很关键。
Deposits also interact with the CAS. A deposit paid towards tuition is usually recorded on the record and reduces the amount of money you must show for the financial requirement. Whether a deposit is refundable depends on the institution's terms and on the reason for withdrawal, so read the small print before paying.
押金也与 CAS 相互关联。作为学费支付的押金通常会记录在 CAS 上，并相应减少你需要证明的资金数额。押金能否退还要看学校条款和退学原因，所以在付款前务必看清细则。
9. CAS, Money and the Financial Requirement | CAS、资金与财务要求
Money is worth 10 points, and it is where the CAS speaks most directly to your bank account. You must show tuition fees for the first
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