How to Write a Formal Email or Letter - C1 English Writing — Explanation

How to write a formal email or letter at C1 level

A successful C1 formal email or letter does more than use polite vocabulary. It responds precisely to the situation, develops every required point and guides the reader towards a clear outcome. In Cambridge C1 Advanced Writing Part 2, a formal email or letter may ask you to request information, give feedback, make a complaint, recommend changes or apply for an opportunity. Your response should normally be 220–260 words.

The best answers sound professional without becoming stiff. They combine an appropriate register with specific evidence, logical paragraphing and tactful requests. Before writing, identify three things: who will read your message, why you are writing and what you want the reader to do.

Analyse the task before you write

Underline the recipient, the purpose and every content point. If the task asks you to describe a positive feature, explain two problems and propose a solution, all four elements must appear. Missing one point limits the effectiveness of the response, even if the language is accurate.

• Reader: What is your relationship with this person? Do you know their name?
• Purpose: Are you informing, persuading, complaining, requesting or recommending?
• Outcome: What practical response do you expect?
• Evidence: Which details will make each claim convincing?

A clear five-part structure

1. Salutation

Use Dear Mr/Ms/Dr + surname when the name is supplied. Use Dear Sir or Madam when it is not. Avoid first names unless the context clearly permits them.

2. Opening paragraph

State the subject and purpose immediately. A precise opening such as I am writing in response to the proposed changes to... is more useful than a long general introduction. If relevant, explain your connection to the event, organisation or service.

3. Developed body paragraphs

Give each major task point its own paragraph. Begin with a controlling sentence, then add a reason, consequence or example. Compare these two versions:

The timetable was inconvenient.

The revised timetable was particularly inconvenient because the final session ended after the last scheduled bus, leaving several participants without transport.

The second version provides evidence and explains impact, which makes the criticism credible.

4. Request or recommendation

Make the desired action explicit but diplomatic. Modal verbs, conditional forms and impersonal structures soften the request without weakening it: I would be grateful if you could review the timetable; It might be worth introducing an online booking system; I would recommend that additional staff be assigned.

5. Closing and sign-off

End by looking forward, restating the expected action or expressing confidence that the issue can be resolved. Use Yours sincerely after a named recipient and Yours faithfully after Dear Sir or Madam. Add your full name.

Formal language that sounds natural

C1 writing requires control, not a collection of unnecessarily complicated phrases. Prefer precise verbs and measured evaluation. Avoid contractions, slang, emojis, conversational fillers and blunt commands.

• State purpose: I am writing with regard to... / I am writing to raise a concern about...
• Acknowledge positives: I particularly valued... / One especially beneficial aspect was...
• Introduce criticism: Nevertheless, one issue requires further attention. / Despite these strengths, several difficulties arose.
• Explain consequences: This resulted in... / Consequently, participants were unable to...
• Recommend: A practical way of addressing this would be to... / I would strongly recommend that...
• Request: I would appreciate clarification regarding... / I would be grateful if you could...
• Conclude: I trust that these observations will assist... / I look forward to receiving your response.

Model task

You attended a weekend leadership seminar organised by a professional association. The organisers have asked participants for feedback. Write an email to the programme director. In your email, explain why you attended, evaluate the seminar, describe a difficulty and recommend improvements.

Model formal email

To: Dr Elena Morris
Subject: Feedback on the Emerging Leaders Seminar

Dear Dr Morris,

I am writing to provide feedback on the Emerging Leaders Seminar held at the Riverside Conference Centre last weekend. Having recently taken responsibility for a small project team, I enrolled in the hope of developing more effective ways to manage disagreement and delegate tasks.

Overall, the seminar was both stimulating and relevant. I particularly valued the negotiation workshop, in which participants analysed realistic workplace conflicts before testing possible responses in pairs. The facilitator’s detailed feedback helped us recognise how minor changes in phrasing can prevent discussions from becoming confrontational.

Nevertheless, the group presentations were affected by a shortage of suitable rooms. Three teams were required to rehearse in the same open area, making it extremely difficult to hear one another or concentrate. As a result, our final presentation was less polished than it might otherwise have been.

For future seminars, I would recommend reserving one quiet space for each presentation group. It might also be beneficial to circulate the case studies several days in advance, thereby allowing participants to arrive with initial ideas and devote more time to discussion.

I trust that these suggestions will be useful when the next programme is planned. Thank you for providing such a worthwhile professional development opportunity.

Yours sincerely,
Marcus Lee

Final C1 checklist

• Have you covered every content point and developed it with relevant detail?
• Is the purpose clear in the opening paragraph?
• Does each paragraph perform one main function?
• Are criticism and requests firm but courteous?
• Have you used varied linking, accurate complex sentences and precise vocabulary?
• Do the salutation and sign-off match?
• Is the response within the required word range?