The Certificate of Sponsorship (CoS) is allocated and assigned in the Sponsor Management System (SMS) portal. Candidates applying from within the UK will require an undefined CoS, whilst candidates applying from other countries will need a defined CoS. There are different CoS allocation processes for each type of CoS, please consult this guide for further details. In case an organisation doesn’t have enough undefined allocated certificates in SMS, they can apply for in-year CoS allocation increase by submitting a request via SMS.