Under what principles can one be sued for not obeying a clickwrap contract they never signed? Many software packages come with a EULA which uses claims such as "by opening this package you hereby agree to ... (some laws going far beyond classical copyright)". Now, what happens if your friend opens the package and installs it on his computer, and I would use the software not in a way permitted by the EULA. For example, I decompile someone's code which they prohibit by EULA. Under what grounds can I be sued? I never agreed to the EULA so it's not contract violation.
It's a contract violation if you're under the EULA. It may be a contract of adhesion, but such "clickwrap" contracts been found to be acceptable and enforceable in software EULAs out of necessity. However, there may be some limits. If you're not under the EULA, as you argue, then you lack a license to use the software at all and it's an outright copyright violation and/or a theft or misappropriation of the software. Whether or not you can be sued depends in part on what you do with it — if you don't release the material or otherwise cause damages then there's not much to sue for... Added for clarification: to answer the framing question, supposing neither contract or copyright applied, one could be sued in tort or in equity (i.e. for unjust enrichment).
Ah, the old &quot;is this contract invalid (but still legally binding for the other party)&quot;? You signed a contract with someone else. You do not dispute that it was you who signed the contract and agreed to it. You made it abundantly clear that there was a contract between you when you allowed him to do the work. This means one of the following was true: There was a mistake in the contract. What was followed was how it was intended. You signed a contract containing false information in an attempt to defraud someone. One of these will end up much worse for you. The fact that the work was not completed to the agreed upon standard could be considered a breach of contract- this is something a small claims court would decide.
You can't grant or license that which is not yours. For example, the Slack terms of service say: We grant to Customer a non-sublicensable, non-transferable, non-exclusive, limited license for Customer and its Authorized Users to use the object code version of these components, but solely as necessary to use the Services and in accordance with the Contract and the User Terms. So Slack's agreement with Org A does not give A any right to let any other organization B use the software. It does not matter how A and B are related, nor whether B is nonprofit or for-profit, nor what A would be getting in exchange. If B wants to use it, they need to make their own agreement with Slack.
You probably can. There are a few questions here. First, is the message protected by copyright? In general, it probably is, but there are many exceptions that might allow you to use it without permission. Unfortunately, these exceptions vary from jurisdiction to jurisdiction. The exceptions tend to allow the use of small excerpts of a work for various sorts of purposes that don't undermine the copyright holder's ability to profit. That leads to the second question, which is why you are using that message. If you're including it in your source code so you can test whether a message generated at run time is in fact that message, that's one thing, and it's probably okay. On the other hand, if the owner of the copyright sells a database of all its message strings, and you're compiling a similar database that you also intend to sell, that's probably not okay. A third question concerns the Firefox license terms. It's entirely possible that they allow you explicitly to do what you're considering, in which case it doesn't matter what copyright law says about it. On the other hand, Firefox is open source software, and under some open source licenses, if you incorporate any of the source code in your own product, you are required to release your product's source code under the same license. If you're not already planning to do that, you should consider carefully whether including that error message would trigger that provision (if there is one) of Firefox's open source license.
If you do, can you build/run it without being bound by said license? No, you cannot. Because there is no way to &quot;build/run&quot; it without making a copy. You copy the sourcecode, before you can run your compiler. That is the copy you are making, not copying the file that results from this process. A valid question might be, are you bound by the license? Well, that is up for lawyers and a court to decide, but in all countries I know, copyright is automatic for anything worth copying. And the copyright holder can grant licenses to people to allow things. So arguing you are not bound by a specific license would mean you would argue that you are bound by the legal default, which in most countries is &quot;You cannot copy that. At all. Unless you have explicit permission&quot;. That argument would sound like &quot;I stole all 10, because the offer of buy-one-get-one-free was not legally binding&quot;. Maybe it wasn't. But that doesn't mean you get to do something unrelated illegal instead. Now, there are many exceptions for &quot;personal use&quot;. You can sing any song in the shower. I would assume you can compile any program there, too. You just cannot use that program for anything worthwhile, the same way you cannot record your song in the shower and sell it.
The only issue relevant to your age is the (ir)revocability of the license. GPLv3 purports to be an irrevocable license. To be really irrevocable, the license would need to grant certain rights in exchange for something of value, that is, you need a license that passes muster as a contract. Copyright licenses are typically treated as contracts, but it is not clearly established in law that licenses are contracts or are not contracts. Out of the goodness of your heart, you can grant permission to use your property, but you can also withdraw that permission. If you have a contract granting perpetual permission to use your property in exchange for something of value, then you can't later withdraw that permission. In the case of Jacobsen v. Kratzer, the sides advances opposing theories that the license was a "bare license" vs. was a contract. (The matter was ultimately settled out of court). This article puts together the legal factors surrounding the notion of license as contract, see p. 21 ff, and esp. §IV for arguments that licenses should be contracts, to be fully enforceable. A contract for non-essentials formed with a minor is not enforceable, until you are 18. You could therefore revoke the license, until you are 18. Anyone who uses the software does so at their peril. However, if the license is not a contract, no existing legal doctrine (in the US) whereby the permission is irrevocable. In other words, yes you can, at their peril. The whole license-as-contract issue is very complicated, and I'm only focusing on the revocability issue. There is a separate question whether one can sue a user for both copyright infringement and breach of contract. The case of Artifex v. Hancom, see also this analysis, found that (in the particular case), plaintiff can pursue the matter as both infringement and contract breach.
The website owner brings in an expert programmer who testifies that the user cannot have gotten to a certain part of the site (or download, etc.) without having clicked to accept the terms of service, and that this document they're holding is a true and correct copy of the terms of service as of that date. That's evidence in favor of the site, and an adverse party has to have stronger evidence in order to overcome it. If the person didn't save a copy of the terms themselves, they'll have a hard time on this. Then the other party's attorney tries to discredit the programmer by asking questions like "how do you know there are no bugs in the software which could have allowed somebody to reach this without agreeing to the terms of service" etc. Apparently, some sites don't require users to click indicating agreement. If the company has significantly changed the site, terms of service, etc. since the time the user registered, and doesn't keep any copies of old versions around, and admits this, they'll have a hard time enforcing an agreement (as they can't produce a copy of it). If the user kept a copy, the user might be able to present that. It's up to the finder of fact to decide what to believe and how much weight to give the various witnesses' testimony.
Is sales person required by law to give a copy of signed contract at the time you sign up for service? No. If I would ask for copy of all documents from that company are they required by law to send her these copies? No. Is there a law that mandates process on how contracts should be signed in California? There are many, however, they relate to specific classes of contract. In general, it is not a requirement that a contract be signed or even written; verbal contracts are totally legitimate. Given that every single transaction where money changes hands in return for goods and/or services is or is part of a contract it is not feasible that they all be signed. Have you bought a cup of coffee today? Did you sign a contract when you did? Here's the thing Your friend has learned several valuable business lessons: the first is some people in business will rip you off. If you are a consumer then you have (some) legal protection, however, if you are in business then the courts and the legislature expect you to look after yourself. Your friend has signed a contract. Pretty much, any court will consider that what they signed would be the entire contract unless there was compelling evidence to the contrary. Her word that the sales rep said there would be no break charges would not on its own be compelling evidence. Your friend has an obvious incentive to lie. Here is the second lesson: don't sign anything unless and until you have read and understood it; hire a lawyer if you need to in order to understand it. Now, either under the contract the company is legitimately allowed to charge these fees or it isn't. Without having a copy of the contract you have no way to tell. Thus the third lesson: always keep your own copy of everything you sign. What your friend can do is: nothing. Don't pay the bill, write to them saying that she disputes that she owes them any money at all. If you want to be provocative, suggest which court would be most convenient if they want to prove the debt. Odds are this will go no further. If they do proceed with a summons then they will need to state their case. At that point she can request through the court a copy of the contract they are relying on. If their claims are legit she can simply roll over.