An ADA website demand letter usually shows up the same way: an envelope or email from a law firm you’ve never heard of, asserting that your site violates the Americans with Disabilities Act and proposing a settlement figure to make it go away. The letter itself is designed to feel urgent — a deadline, a dollar amount, a list of alleged barriers. What it doesn’t tell you is what’s actually happening procedurally, or what your realistic options are in the days after you open it.
Quick answer: A demand letter is not a lawsuit and not a court filing — it’s a pre-litigation settlement offer from a plaintiff’s attorney. There is no federal law requiring a fixed response window before a lawsuit can be filed (no “notice and cure” period exists in the ADA), so any deadline in the letter is the sender’s own choice, not a legal requirement. Demand letters are also several times more common than filed lawsuits and typically stay private unless the dispute escalates. The one universally recommended first step, across the sources below, is the same: talk to an attorney who handles ADA Title III matters before responding to the sender or changing your site.
This article is educational content, not legal advice. If you’ve received a demand letter, the guidance below is general information, not a substitute for a lawyer reviewing your specific letter and site.
What’s actually in the letter
Most ADA website demand letters follow a predictable structure: an assertion that the recipient’s website is a “place of public accommodation” under Title III of the ADA, a list of specific alleged accessibility barriers (commonly missing image alt text, unlabeled form fields, low color contrast, or a checkout flow that can’t be completed by keyboard), a claim that the sender’s client — often described as a “tester” — personally encountered these barriers, and a settlement demand: a dollar figure and a deadline, often paired with a request for a remediation commitment.
It is a demand, not a determination. No court, judge, or government agency has reviewed the claim or ruled on it. The letter is an opening position in a negotiation, written by the sender’s attorney to be persuasive — which is a different thing from being a binding legal deadline.
There’s no legal clock
One of the more consequential facts to understand is what a demand letter’s deadline actually is: a choice made by the sender, not a requirement imposed by law. Under existing federal law, a plaintiff can file an ADA lawsuit the moment they encounter a barrier — there is no legally mandated notice period, and no requirement to send a demand letter at all before suing. As NK Legal explains, Congress came close to changing this: the ADA Education and Reform Act of 2017 (H.R. 620) would have required a written notice and a 60-day opportunity to identify barriers, plus 120 days to make “substantial progress” on fixing them, before a lawsuit could be filed. It passed the House of Representatives in February 2018 and then died in the Senate. It was never enacted.
That matters practically: nothing in federal law obligates a business to respond within the window a demand letter states, and nothing prevents the sender from filing suit before or after that window regardless of what the recipient does. The deadline is a negotiating tactic, not a statute.
How common demand letters actually are
Filed lawsuits are the visible, countable part of this landscape because they become part of the public court record. Demand letters are not — they’re private correspondence, and most are never filed publicly anywhere. That makes exact national counts hard to verify, but the two most-cited trackers in this space give a useful sense of scale.
Seyfarth Shaw’s ADA Title III tracker — one of the most widely cited sources on ADA Title III litigation — recorded 3,117 website accessibility lawsuits filed in or removed to federal court in 2025, up 27% from 2,452 in 2024. Seyfarth explicitly notes that this count doesn’t capture “a significant number of demand letters and lawsuits filed in state courts,” meaning the federal filing count understates total legal activity, not just the demand-letter volume that never becomes a filing at all.
Separately, presenters cited in UsableNet’s 2026 litigation-trends writeup estimated that businesses receive roughly two to three times as many demand letters as the number of lawsuits actually filed — and that demand letters typically remain private unless the dispute escalates into litigation. Read together, the reasonable takeaway isn’t a precise national number (neither source claims one), but a pattern: demand letters are meaningfully more common than filed lawsuits, and most of that activity is invisible until a business is the one receiving the letter.
What to actually do first
The specific right answer for any single letter depends on the letter and the site, which is exactly why this isn’t something a general article can responsibly tell you how to do. But there’s broad, consistent guidance on the immediate first steps, regardless of what the letter ends up leading to. The Bureau of Internet Accessibility recommends contacting qualified legal counsel before taking any other action, and specifically advises against reaching out to the letter’s sender or the claimed plaintiff unless an attorney advises doing so.
A few things worth doing in that window, none of which require deciding on a legal strategy yet:
- Don’t respond to the sender directly until an attorney has reviewed the letter. An informal reply, even a well-intentioned one, can affect the negotiating position later.
- Preserve a copy of your site as it existed when the letter arrived — screenshots or an archived snapshot of the pages named in the letter, dated.
- Get the letter in front of an attorney who specifically handles ADA Title III matters, not general counsel unfamiliar with this area, before making any public changes to the site or agreeing to anything.
- Don’t assume rushing a fix resolves the underlying claim. The legal and technical response is genuinely specific to your letter, your site, and your attorney’s read of the claim — not something a generic checklist can complete for you.
Get ahead of it before a letter arrives
Nothing eliminates the possibility of a demand letter — plaintiffs’ firms sometimes send them to sites that are already in reasonably good shape. But documented, dated remediation work is a materially different starting position than having done nothing, if a letter ever does arrive. A one-time, human-verified WCAG 2.1 AA audit costs $890 and gives your developers exact, code-level fixes — not a risk score, not a guarantee, just a real starting point. See a sample report or check pricing.
This article is provided for general educational purposes and does not constitute legal advice. Every business’s situation is different, and ADA Title III case law continues to develop; consult a qualified attorney for guidance specific to your website, your letter, and your circumstances.