Sanctions against dealing in Bitcoin Some countries are treating dealing in Bitcoin as seriously as drug-dealing and money laundering [0]. Suppose that you are a citizen of another country (and normally live in it) that does not have any wide-ranging laws against Bitcoin. you have a Bitcoin account in your own country (e.g. an authorised online crypto exchange). You then go on holiday to a country that does have such laws against Bitcoin, but you do not get involved in any buying/selling while you are there. Assuming that the country you are visiting somehow comes to find out about your Bitcoin account back home, even though you never got involved in any buying/selling while you were on holiday, can that country's laws be applied against the Bitcoin account in your original country (or any other country)? In other words, for that particular country you are visiting (and as long as you are present in that country), is it an imprisonable felony for residents and visitors alike to have a Bitcoin account anywhere in the world? [0] Draft law proposes 10-year jail term for dealing in cryptocurrency (7 June 2019)
Yes When you enter the jurisdiction of a country, you are subject to its laws. You are not, in general, subject to punishment for things you did before you entered its jurisdiction but if possession of bitcoin (or anything else) is illegal in that country, then possessing that thing makes you subject to prosecution.
The most commonly used definition for statehood is the declaratory theory, codified by the Montevideo Convention. This says that statehood doesn't depend on recognition by other states; it merely requires four things: A defined territory A permanent population An effective government The capacity to enter into relations with other states. You immediately run into issues around the defined territory (you don't really have one) and the capacity to enter into relations with other states. But let's ignore those for a second. Meeting these requirements in some abstract world doesn't mean you get treated like a state. If no one else agrees with your claim to statehood and they act inconsistently with it, you have little recourse. You might get them not caring enough to do anything about it, but if they decide you're not a country you're out of luck. You have some misconceptions about statehood as well. A country is allowed to forbid trade with any foreign country, even ones it recognizes as sovereign states. See: US embargo on Cuba. It is also entitled to deny foreign ships access to its ports. Ships flying the flag of a sovereign state are entitled to innocent passage through territorial waters of another state, but not to the use of that state's ports. A country can certainly allow people to be killed and still be a country. See: the US, which has the death penalty for certain crimes. But if you're killing nationals of a foreign country, that foreign country is likely to take a keen interest in your activities. If the killings are judicially-ordered executions based on violations of your penal laws, that's one thing -- Australia might consider it awful that an Australian citizen was shot by Indonesia for drug smuggling, but they recognize that Indonesia is a real country with its own laws that it has a right to apply. If it's just lawless there, the keen interest might culminate in a travel warning. But in more extreme cases, or where the killings are of people who didn't willingly enter your territory, you're looking at potential military action.
When a country makes criminal laws, these laws usually apply to anyone present in the country, and acting in the country. But the country is free to declare that some law might apply to its own citizens in a foreign country, or even foreign citizens in a foreign country. Assuming the laws about using marijuana say nothing about the country, that most likely means it only applies to using marjuana in the country itself. But if the US government decided that taking marijuana in Canada is illegal for US citizens, then nobody can stop them. In this case, Canada would not extradite you (unless Canadian law says that it is criminal for Canadians to use marijuana in another country), and Canadian police would likely not collect evidence. So even if illegal, it would be hard to convict you. PS. The "polygamy" case would be interesting, I think you would have to read the exact wording of the laws in every country. Some countries will say that you can't get married twice, and the attempt to get married a second time while already married is bigamy. In that kind of country you wouldn't have committed a crime within that country. Also, you would only be married to the first wife.
This is an incomplete answer, but regardless of the state of statutory law in the U.K. and Ireland, most credit card providers, as part of their merchant agreements authorizing a merchant to accept credit card payments, prohibit merchants who accept credit cards from offering a lower price for cash payment than for a purchase using a credit card, despite the fact that in the case of a credit card payment, the merchant has to pay a processing fee to the credit card company that the merchant does not have to pay in a cash transaction. There have been some lawsuits challenging the validity of this requirement, but to the best of my knowledge, none have been successful. Generally speaking, however, it is not illegal to offer a different price if the merchant is paid all at once, as opposed to offering seller financing on installment terms (a different sense of the phase "cash price"), which is a different situation than when a merchant is distinguishing between a credit card payment of the entire price in one go, and a cash payment of the entire price in one go. It isn't entirely clear from your question in what sense "cash price" is customarily used with those tags. Similarly, it is probably permissible to offer one price for people who pay via either cash or a credit card on one hand, and a different price for people who pay via a check (which carries with it a risk that the check will not be honored), since that is not subject to a merchant agreement restriction, although my impression is that checks are used less often for payments in the U.K. (where they were invented) and Ireland, than in the United States.
It is possible in principle, in the US, under the Bureau of Prison Treaty Transfer program, so that one could serve your time in Australia for example -- but not New Zealand, which isn't part of a bilateral or multilateral treaty with the US: here is the list. Canada and Australia are on the list via the Convention on the Transfer of Sentenced Persons. New Zealand is (by choice) not a participant.
Yes This statute means that all United States money as identified above is a valid and legal offer of payment for debts when tendered to a creditor. There is, however, no Federal statute mandating that a private business, a person, or an organization must accept currency or coins as payment for goods or services. Private businesses are free to develop their own policies on whether to accept cash unless there is a state law which says otherwise.
This question really depends on the specific countries involved, as all law depends on jurisdiction. However, there are essentially two ways that breaking into foreign computer systems could be illegal: 1) Your own country has laws against hacking that include hacking into foreign computers or 2) The country you're breaking into has laws about hacking that are not limited to citizens. In the first case, your own country would find such "hacking" illegal; in the second, your target country would find such "hacking" illegal. If you violate the first, which is the less likely option, you could be traced, located and prosecuted by your own country. If you violate the second, which is the more likely option, the target country would target you for extradition and prosecution. Depending on the amount of political power your target country has, this could result in you being shipped off to another country to face their courts, without the protection of your own country. In other words, it could very well be illegal, though the specific sentence resulting from such a crime is far too specific to even attempt to address in the general case.
If you commit a robbery but then return the money, can you be prosecuted? Yes. Similarly, if you breach copyright and then stop, can you be prosecuted? Yes, however, you will probably not be because: Your offence may not have been noticed by the copyright holder, and/or The damages they would get are probably not worth the effort.