Is someone under legal obligation to return a wrongfully issued refund? Suppose someone ordered supplies totaling over $1,000. When he picked up the purchase, he was issued a refund that the order was canceled. He now has all the products he ordered and was not charged. This was not due to him canceling the order; the employee did so wrongfully. Ignoring morals, is there legal obligation for him to attempt to return the refund? Does this fall under unjust enrichment? If so, to what extent must he try?
Ignoring morals, is there legal obligation for him to attempt to return the refund? No, but he must pay for the goods if the supplier asks. Does this fall under unjust enrichment? No. This is simply a contract law issue. The person is contractually obliged to pay for the goods and, in the present circumstances, they haven’t done so. If so, to what extent must he try? He doesn’t have to make an active effort to pay but he can if he likes. However, if and when the vendor realises their mistake and asks for payment, it must be made in a reasonable time.
No. Theft is, in most jurisdiction, an action by which the offender takes another person's property with the intent to permanently deprive them of it. The clerk isn't taking any property from the store, and she doesn't have any intent to deprive the store of anything. She is therefore not guilty of theft. If she were doing this intentionally -- either in league with the customer or even without the customer knowing -- she could likely be held liable for the theft, either on a conspiracy theory or perhaps an innocent-agency theory. The lack of criminal liability of course does not mean that there can be no accountability. The employer is free to terminate the employee, and it will have different options -- depending on jurisdiction -- to recover the value of the uncharged printers, perhaps by docking her paycheck or through a negligence action.
There is no contract Specifically, an agreement to agree is void for uncertainty. If the total cost of shipping was an insignificant fraction of the value of the contract then there might be sufficient certainty - that is, it could be argued that the buyer (or seller) has agreed to pay a reasonable rate for shipping. However, in the context of most items on the site this is unlikely to be the case. As an aside, your use of the term "rescind" is incorrect. Rescission occurs when one party breaches a term of the contract and the other party elects to terminate (and optionally seek damages) in response. The correct term for both parties agreeing to release the other is "termination by agreement".
You have a contract - they have fulfilled their obligation (they paid you), if you do not fulfil their obligation (not to post it online) then you are in breach of the contract. Your obligation continues even if you gift the money back to them. If you breach the contract then they can sue you for the damage that they suffer. Presumably this would be damage to their reputation and for a public figure this could run into millions of dollars. In demanding additional money from them beyond what you are legally entitled to you are, at least, flirting with the crime of extortion/blackmail. This would not be a matter for them to sue you for, it would be a matter for the DA to prosecute if they chose to make a complaint. There doesn't seem to be a defamation issue here because you are not stating anything that isn't true. Now, the extent of the agreement appears to prohibit you posting it on the internet, however, the spirit of the agreement is that you will keep the information secret in all respects - that is likely how a court would look at it. Of course, if someone does steal the information from you then you haven't broken the agreement but you would probably have to prove that it was stolen when they sue you.
Yes, it's illegal new-south-wales s118 of the Crimes Act says: Where, on the trial of a person for larceny, it appears that the accused appropriated the property in question to the accused’s own use, or for the accused’s own benefit, or that of another, but intended eventually to restore the same, or in the case of money to return an equivalent amount, such person shall not by reason only thereof be entitled to acquittal. QED
Is it illegal to ask a company for money in exchange for information on a bug in their software/website? That in itself is legal. Indeed, the company would incur unjust enrichment if it coerced you to disclose your discovery for free. Only if you threatened the company to divulge to others your discovery unless the company pays you, it would be illegal and trigger charges such as extortion (likewise, legislations outlaw the unjustified delivery of programs or instructions for hacking a software/network/etc., although this goes beyond your actual question). Can the company take legal action against me? That seems doubtful, futile, and it could backfire (please note I have not done any research on legal precedents about this). Although the terms and conditions of the website or the End User License Agreement (EULA) of software might prohibit you to reverse engineer (RE)/decompile/etc. the application, anti-RE clauses are unenforceable and the remedies therefor are indeterminate because the sole act of conducting reverse engineering does not subject the company (or third parties) to any losses. The company's decision to take legal action for your discovery could backfire from two standpoints. First, it calls attention to the fact that the software at issue is defective and unsafe. And second, the bug is likely to be detected by someone else anyway, thereby potentially compromising customers' systems.
This is not "libel," which is a form of defamation (publishing a false and defamatory statement that injures another). "Bait and switch" is a type of violation of the Massachusetts Consumer Protection Law. That Law makes it illegal for a business to engage in any false or deceptive practices, or to perform any false or deceptive acts, in commerce. Read more about it on the Massachusetts' state government site. If the restaurant's conduct was deceptive and it caused you harm (for instance, you would not have gone into the restaurant and ordered at all if you had known you had to order a drink to get the favorable price on sliders,) there may be a violation.
You didn't consent to being ripped off. You did however fail to grasp the terms under which you were permitted to park on their property, and you failed to pursue an alternative (such as looking for change; using a credit card). It is possible that you should have known that this was a no-change-given machine, since one can often see that there is no mechanism on these machines whereby you can actually get change. However, if you have clear proof that you owed $6 and you paid $10, then 4 of those dollars are properly yours, and there is a reasonable chance that you could prevail in a suit against them. There is even a greater chance that they would refund the difference, just as a sensible business practice. "Exact change" is legal and can even be the law, especially in government-run transportation systems.