The paper also agrees with UNHCR that universal birth registration will not end statelessness without the minimum legal reforms to provide a right to nationality based on place of birth or descent. These will not be effective, however, unless there are simultaneous efforts to address the conflicts of law affecting recognition of civil status and nationality more generally. UNHCR and its allies in the global campaign must also master private international law. In most legal systems, birth registration must be accompanied by registration of other life events – adoption, marriage, divorce, changes of name, death – for a person to be able to claim rights based on family connections, including nationality. This is the case in principle even in countries where birth registration reaches less than half of all births, and registration of marriages or deaths a small fraction of that number. Fulfilling these obligations for paperwork can be difficult enough even if they all take place in one country, and is fanciful in many states of the global South; but the difficulties are multiplied many times once these civil status events have to be recognised across borders. Depending on the country, an assortment of official copies of parental birth, death or marriage certificates may be required to register a child’s birth. If the child’s birth is in a different country from the one where these documents were issued, the official copies must be obtained from the country of origin, presented in a form accepted by the host country and usually transcribed into its national records. Non-recognition of a foreign-registered civil status event means that it lacks legal effect, leaving (for example) marriages invalid in one country or the other, or still in place despite a registered divorce. If a person’s civil status documents are not recognised in another jurisdiction, the rights that depend on these documents may also be unrecognised: the same child may therefore be born in wedlock for the authorities of one country and out-of-wedlock for another. On top of these challenges related to registration in the country of birth, consular registration and/or transcription into the records of the state of origin is in many cases necessary if the child’s right to the nationality of one or both parents is to be recognised. It is also likely that the parents will need a valid identity document, and if neither is a national of the country where their child is born, a passport with visa showing legal presence in the country. A finding of an error at any stage in these processes can sometimes result in the retroactive loss of nationality apparently held legitimately over many years. Already exhausting for legal migrants in the formal sector, for refugees and irregular migrants of few