A stateless person is someone with no citizenship or nationality. It may be because the state that gave their previous nationality has ceased to exist and there is no successor state, or their nationality has been repudiated by their own state, effectively making them refugees. People may also be stateless if they are members of a group which is denied citizen status in the country on whose territory they are born, if they are born in disputed territories, if they are born in an area ruled by an entity whose independence is not internationally recognized, or if they are born on territory over which no modern state claims sovereignty.
Individuals may also become stateless voluntarily, by formally renouncing their citizenship while on foreign soil; however, not all states recognize such renunciations on the part of their citizens. Often, depending on the specific laws of the countries involved, one may not renounce a citizenship unless one is a dual citizen and can show citizenship in a country other than that of the undesired citizenship. Consulates do not want to deal with the complications associated with statelessness if they can avoid it. However, consular officials are unlikely to be familiar with all citizenship laws of all countries, so there still can be situations where statelessness might arise. For example, children born outside Canada to a Canadian parent or parents are, under certain circumstances, required to establish Canadian residency by age 28 or lose Canadian citizenship. If such a person held dual citizenship and, as a young adult, renounced the second citizenship on the strength of his or her Canadian passport, and then subsequently failed to establish the required Canadian residency, he or she could end up stateless.
Some areas are home to stateless persons. In some cases, such as that of ethnic Russians in Latvia, conditions for citizenship may be problematic or difficult to satisfy. In some enclave areas, such as the FARC-ruled areas of Colombia, and parts of Sudan and Afghanistan, people may have no practical contact with a potentially passport-issuing state which nominally claims sovereignty over them.
While stateless persons were more common before the 20th century, when many states were somewhat fragile entities, on September 20, 1954 the United Nations adopted the Convention relating to the Status of Stateless Persons: an active policy to prevent people becoming or remaining stateless. States which have ratified the Convention are bound to give stateless persons rights similar to those granted aliens of comparable status. Despite this, there are still Kashmiri, Kurdish, Palestinian and Sahrawi refugees who claim asylum due to statelessness, for example.