A certificate of sponsorship (CoS) is essential for obtaining a work visa in the UK. It is issued by UK employers to foreign workers as proof of their job offer and eligibility for a Skilled Worker Visa. This electronic certificate contains important information about the role and the individual’s qualifications. It is crucial for visa applications and ensures compliance with UK immigration regulations. Employers must be approved sponsors to issue a CoS, and workers need this document before applying for their work visa. If you’re an employer or skilled worker, ensure you have a valid Certificate of Sponsorship to begin your journey toward working in the UK.