Letters to Government Agencies — How to Write Formally and Correctly

A letter to a government agency is not the same as a personal letter or a thank-you note to a friend. Here, you're dealing with a document that often becomes part of a case file, a register, or an official record. This means that:

• Wording is interpreted literally, not emotionally.
• Dates, case numbers, and personal details must be exact.
• The letter may be read by several different caseworkers, sometimes long after it was sent.
• An unclear letter risks being sent back or delaying the entire case.

This means structure and clarity matter more than style and personality. The goal isn't to impress, but to be understood quickly and correctly.

Almost all official letters follow the same basic template, regardless of whether the recipient is Skatteverket, the Migration Agency, a local council, or Försäkringskassan.

1. Sender Details at the Top

State your full name, personal identity number (if relevant to the case), address, and preferably a phone number or email for quick contact. Many cases stall unnecessarily simply because the agency can't match the letter to the right person.

2. Recipient and Case Number

Write out the agency's name, any relevant department and — if you have it — the case or reference number. This may be the single most important line in the entire letter, as it allows the mailroom to route it directly to the correct caseworker instead of it landing in a general queue.

3. A Clear Subject Line

A short heading or opening sentence that states what the letter concerns, for example:

"Re: Additional information for sickness benefit application, case number 123456-7890"

This lets the recipient know immediately what's expected of them, even before they've read the whole letter.

4. Body Text in Three Parts

• Background — briefly what the case concerns and what has happened so far.
• Core message — what you want to achieve: appeal, provide additional information, inform, or request an extension.
• Closing — what you expect to happen next, and any relevant deadline.

5. Signature and Date

Close with the place, date, and your signature. For digital letters sent as physical mail, the signature is added automatically during printing, but it's still important to date the letter correctly, since dates often govern statutory deadlines.

A common misconception is that formal language must be complicated or old-fashioned. It doesn't have to be. The best letters to authorities are short, direct, and free of digressions. Some practical tips:

• Write in the active voice: "I am requesting an extension" rather than "An extension is hereby requested."
• Avoid emotionally charged language even if you're frustrated — stick to the facts.
• Be specific about dates, amounts, and regulations instead of writing "recently" or "a sum of money."
• Keep each paragraph to a single idea, so the letter is easier to skim for a busy caseworker.

Appealing a Decision

Clearly state which decision you're appealing, the date of the decision, and why you believe it's incorrect. Attach copies of relevant documentation where possible, and state what decision you want the agency to make instead.

Supplementing an Application

A short text referencing the case number and describing what's being attached is usually enough. Avoid repeating the entire application — the agency already has it.

Requesting an Extension or More Time

Be specific about how much time you need and why. A vague request risks being rejected purely due to lack of clarity.

Letters to Försäkringskassan

Many of the most common cases with Swedish authorities involve Försäkringskassan — sick pay, parental benefit, or housing allowance. It's especially important here to include the correct case number and be clear about which period the case concerns. If you want to dive deeper into this specifically, there's a dedicated guide at /forsakringskassan.

• Sending the letter without a case number, causing it to land in a general queue.
• Mixing several different cases into one letter — write one letter per case.
• Forgetting to date the letter, which can affect statutory deadlines.
• Writing too long and vaguely instead of short and specific.
• Sending sensitive information via ordinary email instead of a physical letter, even though many agencies still prefer or require paper for certain matters.

You don't need to sit with paper, envelopes, and stamps to send a correct official letter. With Posta Brev, you write the text directly in your browser, follow a clear structure, and the letter is printed, enveloped, and posted for you via PostNord. This is particularly useful for letters to authorities because you:

• Avoid handwriting errors that could make a case number illegible.
• Get a neat, professional impression that increases the chance of your letter being processed without delay.
• Can write the letter any time of day, without needing to find envelopes or stamps.
• Get a saved digital copy in case you need to reference the letter later in the process.

Want to try it yourself? Go to /skapa-brev and start writing right away. If you're unsure what it costs to send a formal letter, all prices are listed at /priser.

Unlike personal letters such as love letters or thank-you notes, where handwriting is often appreciated for its warmth, the opposite applies to letters sent to authorities. Legibility always comes before personality. If you still want a personal, handwritten touch for, say, a relative, while handling the formal matter with an authority separately, you can read more about the difference at /handskrivet-brev-online — but for a letter to an authority, typed, clear text is always recommended.

Posta Brev handles far more than just formal documents. If you also need to send an ordinary letter to a friend, you can read more at /skicka-brev, and for holidays there are dedicated guides such as /julbrev or /gratulationsbrev. If you're sending something abroad alongside your official matter, there are separate rules to be aware of, and you can also use /digitalt-frimarke for simpler letters that don't require an envelope.