RedlineREDLINE

← The Redline Blog

When the Terms of Service Change on You: What's Enforceable, What Isn't

When a company quietly rewrites its TOS, the new terms often aren't binding. The case law is on your side, and the same clause that lets them change anything can void their own protections.

7 min read

When the Terms of Service Change on You: What's Enforceable, What Isn't

When the rules change after you sign.

You signed up for a service three years ago. Last Tuesday, the company emailed you a 200-word notice with a link to the "updated Terms." You didn't click. Today their lawyer is telling you that you waived your right to sue, agreed to a 47 percent price hike, and consented to arbitration in Delaware, because you opened the app on Wednesday.

This is the unilateral modification clause doing exactly what it was written to do. It's also the clause that, more than once, has voided the company's own arbitration shield in court. The law on this is more on your side than the email made it sound.

TL;DR

  • Most online TOS contain a clause letting the company change any term at any time, effective on posting, with continued use as your acceptance.
  • Courts have repeatedly refused to enforce these silent changes when notice was buried, when the user had no real chance to consent, or when the clause itself was so one-sided it made the whole agreement illusory.
  • Three named cases do most of the heavy lifting: Douglas v. Talk America (no duty to monitor), Harris v. Blockbuster (illusory promise), In re Zappos (one-way modification voids arbitration).
  • This is the Moving Target shape from the contract red flags playbook. The fix is the same: pin the price, lock the venue, require real notice.

What the clause actually says

The canonical pattern:

We reserve the right, in our sole discretion, to modify, amend, or
replace these Terms at any time and for any reason. Any such changes
will become effective immediately upon posting to the Service. Your
continued access to or use of the Service following the posting of
revised Terms constitutes your acceptance of those Terms. It is your
responsibility to review the Terms periodically for changes.

What it means: The company can change anything. They don't have to tell you. Showing up to the website is your signature. Reading the new terms is your job.

Four moves are stacked into that paragraph. Each one is doing real work: sole discretion (no good-faith limit on what they change), effective immediately upon posting (no advance notice), continued use is acceptance (no affirmative click required), and your responsibility to review (the duty to monitor flips onto you).

A clause this aggressive is also a clause that courts have been treating skeptically for almost two decades.

Why "we'll just post it on the website" stopped working

Medium risk in most states. Low risk if you can document that you never received direct notice.

In Douglas v. United States District Court (Talk America), the Ninth Circuit refused to enforce a Talk America TOS modification that quietly added new fees, an arbitration clause, a class-action waiver, and a New York choice-of-law clause. Talk America had posted the changes to its website. The court held that "even if Douglas's continued use of Talk America's service could be considered assent, such assent can only be inferred after he received proper notice of the proposed changes." Customers, the court said, have no duty to "obsessively check the website for unilateral changes."

The principle that came out of that case has held up across circuits. A unilateral modification posted only to the company's site, without conspicuous direct notice to the user, generally doesn't bind. Email-with-a-link-buried-in-paragraph-three is on the borderline. A pop-up that requires an "I Accept" click on the new terms is solid.

The illusory-contract jiu-jitsu

This is the consumer's actual leverage.

The clause that boomerangs:

Company may modify these Terms at any time. The amended Terms will
apply prospectively to all transactions after the effective date.
Continued use of the Service constitutes acceptance.

What it means: If the company can change anything at any time, they haven't actually promised anything. A promise that the promisor can revoke at will isn't a promise. A contract built on it isn't a contract.

In Harris v. Blockbuster, the company tried to compel arbitration under its TOS. The same TOS gave Blockbuster the right to "change any term … at any time" effective on posting. The court refused: Blockbuster had "promised nothing of value," so the entire arbitration clause was illusory and unenforceable.

In re Zappos.com Customer Data Security Breach Litigation extended the logic. Zappos' agreement let it change any term while binding users to the existing arbitration carve-out. The Nevada district court called the resulting one-sided modification right "illusory" and refused to enforce arbitration. The same clause that was supposed to keep Zappos out of court was the reason the court let the case proceed.

The lesson: when a company points at the modification clause to claim you're bound to a new term, the same clause is often the argument for why none of the contract is enforceable. This rarely gets used because most consumers settle before it gets that far. It's there.

A red ink underline beneath the phrase CONTINUED USE on a yellow legal pad

Why "continued use" sometimes counts and sometimes doesn't

High risk if you keep using the service after a clear, conspicuous, direct notice. Low risk if the notice was buried.

Courts have been drawing a line between inquiry notice (a reasonable user would have seen it) and actual notice (the user had to click to acknowledge it). Inquiry notice is shaky. Actual notice via affirmative assent is the gold standard.

In Sgouros v. TransUnion, the Seventh Circuit held that an "I Accept" button on a TransUnion sign-up page didn't form a contract because the button copy didn't reference the terms. The button has to point at the agreement. Just clicking through a checkout doesn't bind you to whatever the company posts on a separate URL.

Most companies know this and have moved to checkpoint-style consent: a modal with a scroll-to-bottom requirement and a fresh accept button. If you saw one of those and clicked, the modification probably binds. If you got a marketing email with "we updated our terms" in the subject line and never opened it, the company's notice argument is weaker than they're letting on.

What actually changes in a TOS update

Medium risk depending on which lever they pulled.

The five things that get inserted or sharpened in a "minor TOS update":

  1. Arbitration carve-in. Adding a binding arbitration clause and class-action waiver to an agreement that didn't have one. This is the single most consequential change a company can make. The contract red flags playbook walks through why arbitration cuts off most consumer remedies.
  2. Price escalator. "We may adjust pricing on 30 days' notice." This converts a fixed-price subscription into a variable one. Often combined with a renewal clause; see the auto-renewal walkthrough.
  3. Data-use expansion. New rights to share, sell, or train on your data. The new terms grant a broader license than the old.
  4. Cancellation friction. Adding notice windows, certified-mail requirements, or "billing-period" cutoffs that didn't exist before.
  5. Liability cap reduction. Lowering the maximum the company will ever owe you, or expanding the categories of damages they disclaim.

If a TOS update changes one of these and you didn't affirmatively click to accept it, you've got an argument. If it changes two or more without conspicuous notice, the change starts to look bad-faith on its face, the kind a court calls "unconscionable" before it gets to enforceability.

What to do if you're being told a new term applies

Three concrete moves.

  1. Pull the original TOS. The Wayback Machine usually has snapshots of the version that was in force when you signed up. Compare to today. The diff is often the case.
  2. Find the notice. Search your email and the in-app notification log for the date the company says you were told. If the only "notice" is a help-center page they updated, you have a Talk America problem to point at.
  3. Read the modification clause itself. If it says "sole discretion … any time … continued use," cite Harris and Zappos when you push back. The same clause that binds you might void the term they're trying to enforce.

If a charge already hit, dispute the card transaction, cite the clause, and reference the modification timeline. Card networks side with consumers on disputed recurring charges more often than companies admit.

One clause, one moving target, one fight worth picking

The unilateral modification clause is the Moving Target shape from the contract red flags playbook. It looks airtight on the page. It almost never is, when actually litigated. Companies count on the gap between what the clause says and what a court would do with it. The gap is the point.

Redline scoring a Terms of Service: 72/100, HIGH RISK, with unilateral changes, effective on posting, continued-use consent, and retroactive application flagged

Redline scans contracts in plain English. Photograph the TOS, paste the text, or upload the PDF, and it flags the modification clause, the notice requirement, the continued-use language, and the change vectors that matter. One scan, one dollar. Available on iOS and Android.

Frequently asked questions

Can a company change its Terms of Service without telling me?
Often the change is in the company's records, but not always enforceable against you. Courts in most US jurisdictions require some form of notice and assent before a change in TOS becomes binding. Silent changes, where the company quietly updates the TOS page and claims continued use is acceptance, fail under cases like Douglas v. Talk America in the 9th Circuit. The trend is toward requiring affirmative click-through assent for material changes, particularly for arbitration clauses, class-action waivers, and price changes. A change buried in a TOS update with no email notice usually does not bind existing users.
Are 'continued use is acceptance' clauses enforceable?
Often no, especially for material changes. Courts increasingly require actual notice plus a clear opportunity to reject, not just silent updates. The 9th Circuit's Douglas v. Talk America case rejected the idea that a company can rewrite a contract simply by changing the website and pointing to continued use. The 2nd Circuit in Schnabel v. Trilegiant ruled the same way for arbitration clauses added after signup. State courts in California, New Jersey, and Massachusetts have followed similar reasoning. The clause is in many TOS documents, but it does not always do what the company hopes it does.
What is the difference between clickwrap and browsewrap?
Clickwrap requires the user to actively click an 'I agree' button to accept the terms, usually with the terms visible or linked next to the button. Browsewrap claims acceptance by mere use of the site, often referencing terms in a footer link the user never sees. Courts enforce clickwrap consistently. Browsewrap rarely survives a challenge, especially for material clauses like arbitration. The Specht v. Netscape case in the 2nd Circuit in 2002 set the modern rule against browsewrap. If a TOS change is rolled out as a passive update with no click-through, the change probably does not bind existing users.
Can I sue a company that changes its TOS to remove my rights?
Yes, in many situations. The most common claim is that the change is unenforceable for lack of consideration or lack of assent, leaving the original TOS in effect. Some changes also violate state consumer-protection statutes, particularly when the change shrinks refund rights, adds arbitration after a dispute has arisen, or removes warranties. Filing in small claims court is often the most effective path because it bypasses arbitration in most jurisdictions. Class-action waivers in updated TOS may also fail if the user did not affirmatively assent to the new version.
How do I know if my TOS has changed?
Three places to check. The TOS page itself usually has a 'last updated' or 'effective date' line at the top. Email archives, since most companies are required by their own terms or by state consumer-protection law to send notice of material changes. And the Internet Archive's Wayback Machine, which lets you compare a company's TOS as of any past date to the current version. For purchases or subscriptions, the current TOS at the time you signed up is the one that controls, not whatever the company posts later, unless you affirmatively agreed to the new version.
What should I do if a company adds an arbitration clause after I signed up?
Three responses. First, send a written objection to the arbitration clause within any opt-out window the company provides, usually 30 days from notice. Many companies include a one-time opt-out specifically because courts have been refusing to enforce silently added arbitration clauses. Second, document the date you signed up and the TOS in effect at that time using the Wayback Machine. Third, if you end up in a dispute, argue that the arbitration clause was added without notice or assent and is unenforceable against you under the original TOS, which is the version that controls.

Keep reading