Confirmation of Acceptance for Studies (CAS) is a document that confirms your acceptance at the University of Portsmouth. This document is very important for your visa applications. It is sent automatically to international students by email, when you have: · Accepted an unconditional firm offer from the university · Paid your tuition fee deposit or provided evidence of financial support · Complete your visa eligibility assessment · Obtained Academic Technology Approval Scheme (ATAS) clearance · The email with the CAS will contain a unique number, which you will need for your UKVI student route visa application.