From the 22nd February 2010, any migrant who applies to study in the UK under Tier 4 of the points-based system must have a Confirmation of Acceptance for Studies (CAS) from their prospective sponsor.
The UK Border Agency will accept applications that are supported solely by visa letters if they have been lodged and paid for on or before the 21st February 2010. Any applications that are paid for on or after the 22nd February 2010 and are not supported by a Confirmation of Acceptance for Studies will be refused.
The date of application is the date that the fee associated with the application is paid. This means the date shown on the payment receipt, which depends on how the student paid for his / her visa application, for example, at a British diplomatic mission overseas, visa application centre or online. Applicants wishing to apply with a visa letter must ensure that an appointment to make a payment is made before the 22nd February 2010.