What makes a good legal letter? (so your complaint actually gets resolved)

Introduction
You have a complaint. You may have already emailed. Maybe even several times.
But nothing happens.

Chances are the problem is not your complaint itself, but how you phrase it.

A good legal letter often makes the difference between being ignored and being taken seriously. In this blog you will learn exactly what a strong legal complaint letter needs.

1. A clear and concrete description of the problem
Many people stay vague: "I am not satisfied" 👉 That does not work.

A strong letter:

• states what happened
• includes dates and facts
• is specific and verifiable

Example: "On 12 March 2026 I received product X, which became defective within 2 weeks."

2. Reference to your rights (very important)
This is where the difference is made.

• Without a legal basis: you are "a complaining customer"
• With a legal basis: you are "someone with rights"

A good letter:

• references legislation (e.g. consumer law)
• shows you know what you are entitled to

Example: "Under the right of withdrawal I am entitled to a refund within 14 days."

3. Supporting evidence
The stronger your evidence, the less room for dispute. Think of:

• invoices
• screenshots
• emails
• photos

Also mention this explicitly in your letter.

4. A clear demand (this is what many people forget)
Many complaints stall because there is no clear ask. What do you actually want?

A good letter states:

• what you are demanding
• within what timeframe

Examples:

• "I request you to refund €250 within 14 days"
• "I expect a free repair within a reasonable period"

5. A deadline (creates urgency)
No deadline = no urgency. Deadline = action.

Good example: "I request you to respond within 14 days of the date of this letter."

6. State the consequences
This is where you get taken seriously. Show what will happen if they do nothing.

• further legal steps
• debt collection / disputes committee

Example: "In the absence of a response I will be forced to take further legal action."

7. Professional and businesslike tone
Many people write from emotion. That works against you.

A good letter is:

• calm
• businesslike
• clear

Not:

• angry
• threatening
• incoherent

8. A clear structure
A strong letter is easy to scan:

• Introduction (situation)
• Problem
• Rights
• Demand
• Deadline

This makes it easier for the recipient to act.

Why many complaint letters do not work
Because they:

• are too emotional
• have no legal basis
• contain no clear demand
• give no deadline

Result: ignored.

Want to make sure your letter actually works?
Writing a good legal letter is harder than it looks. That is why we do it for you.

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• a legally grounded complaint letter
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✔ Based on Dutch law   ✔ Professionally drafted   ✔ Within 48 hours (or 12 hours with express)

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