An intent to sue letter is a formal written notice telling a person or business that you plan to file a lawsuit unless they resolve your complaint. It works as a final warning and a negotiation tool, and in some situations — mainly claims against government agencies — sending one is a legal prerequisite to filing suit at all.
Why Send One
The practical goal is simple: get the other side to take your claim seriously. A well-written letter signals that you’ve organized your evidence, thought through your legal position, and are prepared to follow through. That shift in tone, from informal complaint to formal legal notice, is often what finally prompts a response from someone who has been ignoring you.
The letter also builds a paper trail. If the dispute ends up in court, you can show a judge that you made a good-faith effort to resolve things without litigation. Courts tend to look favorably on parties who tried to work things out first.
Writing the letter forces you to sharpen your own thinking, too. If you can’t articulate a clear legal basis for your claim on paper, that’s useful information before you spend money on a lawsuit.
When Notice Is Legally Required
For most private disputes between individuals or businesses, the letter is optional but strongly recommended. In a handful of situations, though, you cannot file at all unless you first send formal notice and wait a specified period.
Claims Against the Federal Government
If your claim involves injury, property damage, or financial loss caused by a federal employee acting in their official role, the Federal Tort Claims Act requires you to file a written administrative claim with the responsible agency before you can sue. You must submit it within two years of the incident.1Office of the Law Revision Counsel. 28 USC 2401 – Time for Commencing Action Against United States The agency then has six months to investigate and respond. If it denies your claim or doesn’t respond within that window, you can treat the silence as a denial and proceed to court.2Office of the Law Revision Counsel. 28 USC 2675 – Disposition by Federal Agency as Prerequisite Skip this step and a court will dismiss your case outright.
Claims Against State and Local Government
Most states impose similar notice requirements before you can sue a city, county, or state agency. The deadlines are often much shorter than you’d expect. Many jurisdictions give you just 90 days from the date of injury to notify the government of your intent to sue. Miss that window, even by a day, and your claim may be permanently barred regardless of how strong it is.
Medical Malpractice in Many States
A significant number of states require patients to send a written notice of intent before filing a medical malpractice lawsuit. These laws typically impose a cooling-off period of 90 to 182 days, during which both sides can exchange information and try to resolve the claim. If you’re considering a medical malpractice case, check your state’s pre-suit notice requirements before doing anything else.
What Does Not Count: EEOC Charges
Federal employment discrimination claims follow a different process entirely. Before suing over discrimination based on race, sex, age, disability, religion, or similar protected characteristics, you generally must first file a formal charge with the Equal Employment Opportunity Commission. Once the EEOC completes its process, it issues a Notice of Right to Sue, and you then have 90 days to file your lawsuit.3U.S. Equal Employment Opportunity Commission. Filing a Lawsuit An intent to sue letter does not substitute for filing a charge with the EEOC.4U.S. Equal Employment Opportunity Commission. Filing a Charge of Discrimination
What to Put in the Letter
Open by identifying yourself and the recipient clearly, with full names and addresses. If you’re writing on behalf of a business or an estate, state that relationship upfront.
The core of the letter is a factual account of what happened. Write it in chronological order, stick to facts, and keep emotion out. Include dates, locations, and the specific actions or failures that caused your harm. Think of it as telling the story to someone who knows nothing about the situation. The clearer this section is, the more seriously the recipient will take the letter.
After the facts, identify the legal basis for your claim. You don’t need to cite specific statutes, but you should name the type of wrongdoing: breach of contract, negligence, unpaid wages, property damage, or whatever fits.
Then make your demand specific. “I want to be made whole” is meaningless. “$7,400 for unpaid invoices plus interest” is a number someone can respond to. If you want something other than money, like completion of contracted work or return of property, spell that out with equal precision.
Finally, set a deadline. Fourteen to thirty days is standard. State clearly that if the deadline passes without a satisfactory response, you intend to file a lawsuit.
Be Careful What You Write
Your letter may become evidence. Federal Rule of Evidence 408 generally prevents settlement offers and statements made during settlement negotiations from being used in court to prove or disprove the amount or validity of a claim.5Legal Information Institute. Rule 408 – Compromise Offers and Negotiations That protection has limits.
Rule 408 only kicks in once there’s an actual dispute and compromise negotiations are underway. A demand letter that precedes any negotiation may not qualify at all. And even during negotiations, the rule includes exceptions: a court can admit settlement-related evidence to show a witness’s bias, to counter a claim of undue delay, or for other purposes beyond proving the claim’s value.5Legal Information Institute. Rule 408 – Compromise Offers and Negotiations
Write every word as if a judge will read it. Don’t exaggerate your damages, don’t make threats beyond filing a lawsuit, and don’t admit fault for anything. If you’re unsure whether something could hurt your case later, that’s a good reason to have an attorney review the letter before you send it.
Watch Your Statute of Limitations
This is where people make costly mistakes. Every civil claim has a statute of limitations, a deadline after which you lose the right to sue. These deadlines vary by claim type and state but commonly fall somewhere between one and ten years from the date of the incident or discovery of harm. Sending an intent to sue letter does not pause or extend that deadline.
People sometimes send a letter, give the recipient 30 days to respond, wait for a counter-offer, negotiate for a few more weeks, and then realize they’ve run out of time to file suit. The clock keeps ticking the entire time. If your statute of limitations is close, file your lawsuit first and negotiate afterward, or at minimum consult an attorney about your deadline before sending anything. No amount of good-faith negotiation will save a time-barred claim.
How to Send It
Delivery method matters because you may need to prove the recipient actually received your letter. The most reliable option is USPS Certified Mail with a return receipt requested. Certified Mail gives you a mailing receipt as proof you sent the letter. The return receipt requires the recipient to sign on delivery, and that signed card comes back to you as confirmation.6United States Postal Service. PS Form 3811-A – Request for Delivery Information/Return Receipt If the recipient later claims they never got your notice, you have a dated signature proving otherwise.
As of mid-2025, the Certified Mail fee is $5.30 on top of standard postage, plus $4.40 for a hard-copy return receipt or $2.82 for an electronic version.7United States Postal Service. Notice 123 – Price List The electronic option is cheaper and provides a digital confirmation instead of a physical signed card.
If you’re dealing with someone who might dodge delivery or refuse to sign, a private process server is another option. A process server hand-delivers the letter and then files a sworn affidavit confirming delivery, which carries significant weight in court. Fees typically range from $40 to $200 depending on location and how many attempts are needed.
What to Expect After You Send It
The best outcome is that the recipient complies with your demand and the dispute ends. This happens more often than people assume, particularly when the claim is clear-cut and compliance costs less than fighting a lawsuit.
More commonly, the recipient or their attorney responds with a counter-offer or a request to negotiate. That’s a good sign. It means they take the claim seriously enough to engage, and most disputes that reach the negotiation stage settle without ever going to court. Be prepared to compromise on your initial demand while holding firm on the core of what you’re owed.
You may also get a formal denial, laying out the other side’s version of events and rejecting your claims entirely. A denial isn’t necessarily the end of negotiations, but it tells you the other side is preparing to defend the case. Use that moment to reassess your evidence and talk with an attorney about the strength of your position.
Then there’s silence. Some recipients simply ignore the letter, either hoping you’ll go away or because they don’t act until forced to. If your deadline passes with no response, you’ve done your part. The next step is filing the lawsuit, and your certified mail receipt will show you gave fair warning and a reasonable chance to resolve things.
Should You Hire an Attorney
You can write and send an intent to sue letter yourself, and for straightforward disputes like unpaid invoices or security deposit disagreements, many people do. If your claim involves significant money, complex legal issues, or a recipient with their own legal team, an attorney-drafted letter lands differently. A letter on law firm letterhead signals a level of commitment that a personal letter doesn’t.
Attorney fees for drafting a demand letter typically run between $500 and $750, depending on complexity and your market. That may sound steep for a letter, but an attorney will also spot weaknesses in your claim, keep you from inadvertently harming your position with careless language, and confirm that you’ve met any pre-suit notice requirements that apply to your situation. If the letter works and you avoid litigation entirely, that’s money well spent.