Documenting your own Mexican nationalityThis isn't a process to become Mexican: if your father or mother is Mexican, you already are, from birth. What's missing is the paperwork. The process is called birth registration and it's done at a Mexican consulate or at a Registro Civil in Mexico — and which route you choose changes everything else: the consulate requires no apostille or translation but you depend on getting an appointment; in…Confirm your parent is registered as MexicanThis is the link everything depends on. If they were born in Mexico, their Mexican certificate exists and is requested from the Registro Civil of the state where they were born. If they were born abroad and never obtained their Mexican papers, you cannot register before they do: the middle link is…Choose the route: consulate or Registro Civil in MexicoThere's no single answer. The consulate requires no apostille or translation and is usually cheaper overall, but you depend on getting an appointment and the wait can run to months. The Registro Civil in Mexico is resolved the same day and with no appointment, but requires an apostille and a perito…Get your foreign certificate in long formIt has to carry the complete details of both parents. Many countries issue an abbreviated version by default that doesn't include them, and that one won't do: the Mexican office needs to see the parentage. Ask expressly for the long or full certified version.If going through Mexico: apostille and translate, in that orderOrder matters and can't be reversed: first the apostille, issued by the government of the country or state that produced your certificate, and then the translation, done by a perito authorized by the court of the Mexican state where you'll register. The translation must also cover the text of the…Check the names match, letter by letterCompare your foreign certificate against your parent's certificate and ID. An accent, a letter, or surnames in a different order is the most frequent cause of processes halted at the counter, and it's fixed beforehand with far less effort than afterwards. If there's a real discrepancy, it has to be…Show up and get your Mexican certificateAt the consulate, by appointment. In Mexico, at any Registro Civil office in the state, usually without an appointment. Leave with at least two certified copies: you'll need them for the CURP, for the passport and for any later process, and requesting them afterwards costs more than asking on the…Get your CURP and then your passportWith the Mexican certificate you can now generate your CURP online, and with certificate and CURP apply for the Mexican passport through the SRE. At the same consulate they can often issue the passport at the same registration appointment: worth asking when you book, because it saves a whole wait.