Student visa

What is a CAS, when does it arrive and what is it for?

10 October 2026 · 7 min read

A CAS (Confirmation of Acceptance for Studies) is the electronic reference a licensed UK sponsor issues to you. It is not a paper document but a reference number and the record behind it.

Validity

A CAS is valid for six months from issue, and the visa application must be made within that window.

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