Work and sponsors / Insights

Certificate of Sponsorship (CoS): who assigns it and who applies for the visa?

A relatable fictional story, clear explanations, practical takeaways and answers to common questions.

UK VISA TAX · Editorial guide updated 24 September 2026 · General information

A job offer, a sponsorship reference and a visa decision are three different things.

An international professional discussing a job offer with a UK hiring manager
Illustrative image; not a client photograph.
A fictional situation

Aisha’s next decision

Aisha has an offer letter, a proposed start date and an email saying that sponsorship is in progress. She is ready to book a flight, but cannot identify whether a CoS has actually been assigned.

She asks the employer to clarify the sponsorship stage and checks which details relate to the job and which relate to her own application. The employer's task and her visa preparation now sit on two separate lists. This small pause avoids treating a recruitment milestone as immigration permission and gives both sides a clearer basis for discussing timing without promising a decision date.

An illustrative scenario, not a client story or an example of a successful application.

The sponsor’s role

A licensed employer assigns the CoS through its sponsorship arrangements where required by the route. A third-party adviser cannot legitimately manufacture or sell a CoS independently.

The worker’s role

The applicant must give truthful personal information and meet the relevant visa requirements. Sponsorship does not itself guarantee approval.

The adviser’s role

A suitably authorised adviser may assist with an appropriate immigration application or separately agreed employer work within competence. These are distinct engagements.

Ask a crucial question

Before paying anyone, check what service is actually being offered: visa preparation, employer licensing, CoS assignment or recruitment. Be wary of unclear fees and unsupported promises.

Key takeaways: what to do next

  • Start here. Confirm whether sponsorship is proposed or a CoS has been assigned; keep the employer's tasks separate from your application.
  • If the facts are clear, compare them with the current official guidance below and list the evidence still needed. Keep the purpose of each document clear.
  • If a fact is uncertain or disputed, flag it before submitting or paying for application work. Ask whether the issue needs an adviser with different authorisation or experience.

An enquiry does not extend a deadline or confirm that we have accepted instructions. For an urgent matter, seek appropriately authorised help promptly.

Frequently asked questions

Who assigns a Certificate of Sponsorship?

A licensed employer assigns the CoS through its sponsorship arrangements where required by the route. A third-party adviser cannot legitimately manufacture or sell a CoS independently.

What does the worker still need to do after a CoS is assigned?

The applicant must give truthful personal information and meet the relevant visa requirements. Sponsorship does not itself guarantee approval.

Can an immigration adviser sell or issue a CoS?

A suitably authorised adviser may assist with an appropriate immigration application or separately agreed employer work within competence. These are distinct engagements.

What should a worker clarify with the employer first?

Before paying anyone, check what service is actually being offered: visa preparation, employer licensing, CoS assignment or recruitment. Be wary of unclear fees and unsupported promises.

What is the practical lesson from Aisha’s example?

Confirm whether sponsorship is proposed or a CoS has been assigned; keep the employer's tasks separate from your application. The example is fictional and does not establish eligibility or predict a decision in another case.

Next steps and official guidance

Check the current official GOV.UK route guidance ↗ and our Level 1 scope and referral policy. For suitable straightforward help, send UK VISA TAX a brief enquiry. Our professional fees are listed separately from government charges on our fee-scale page.

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