What You'll Learn
How to use AI to write formal letters — complaints, appeals, official requests, and legal correspondence — that are clear, appropriately assertive, and professionally structured.
Why This Matters
Formal letters can feel intimidating. The right tone is a fine balance: assertive enough to be taken seriously, measured enough to remain professional. Most people either write letters that are too emotional to be effective, or too meek to prompt action. AI understands what formal correspondence should look and sound like — it can help you write something that gets a response.
Step-by-Step Guide
Step 1: Describe your situation clearly
Give AI the full context before asking it to write anything:
I need to write a formal letter. Here is the situation:
What happened: [describe the issue or situation]
Who I'm writing to: [organisation, department, or person]
What I want to achieve: [refund / apology / action taken / appeal a decision / request information]
Key facts and dates: [list the relevant facts]
What I've already tried: [previous contact, if any]
Step 2: Generate the draft letter
Based on the above, please write a formal letter that:
- Opens with a clear statement of the issue
- Presents the facts concisely and in chronological order
- States clearly what resolution I am requesting and by when
- Maintains a professional, firm tone throughout — not aggressive, not apologetic
- Closes with a clear next step
Format it as a proper business letter.
Step 3: Adjust the tone
Sometimes you need to calibrate the assertiveness:
This letter is [too aggressive / too polite / too long]. Please revise it to be [more direct / more formal / more concise]. The key point I want the reader to take away is: [your main point].
Step 4: Polish with Grammarly
Before sending, run the final draft through Grammarly to catch any grammar or tone issues — a polished letter carries more weight than one with small errors.
Common Types of Formal Letters AI Handles Well
- Consumer complaints — to retailers, service providers, airlines, utilities
- Insurance appeals — disputing a rejected claim
- Landlord correspondence — requesting repairs, disputing deposit deductions
- Employer letters — flexible working requests, formal grievances
- School or university appeals — grade appeals, disciplinary hearings
- NHS complaints — raising concerns about care received
Tips for Better Results
- Include reference numbers and dates. Any relevant order number, policy number, or previous correspondence date should be in the letter — it signals you are organised and serious.
- State your deadline. "I expect a response within 14 days" is more effective than no deadline at all.
- Ask for the "next escalation step." "If this does not resolve the issue, what organisation or ombudsman should I reference in the letter as my next step?"
Tools That Work Best for This
- Claude — excellent at calibrating tone precisely. Tell it the exact effect you want the letter to have and it will adjust accordingly.
- ChatGPT — great for quickly producing multiple versions of a letter at different levels of formality or assertiveness so you can pick the best approach.
- Grammarly — use it for a final grammar and tone check before sending any formal correspondence.