Many countries issue both ‘abridged’ and ‘unabridged’ birth certificates – or ‘short’ and ‘long’ birth certificates, respectively. Abridged/short birth certificates generally reflect only the individual’s date of birth, place of birth, name and identity number (‘ID number’), if applicable; they do not reflect the parents’ information. Unabridged/long birth certificates also include the parents’ names, nationalities, dates of birth and ID numbers in addition to the child’s details. The unabridged birth certificate is typically required for individuals to prove a claim to nationality through their parents. 2.5 Defining the concepts parents a birth certificate for their child. At a minimum, the birth certificate reflects the child’s legal name, date of birth and place of birth. Undocumented person An undocumented person is someone who has no governmentissued proof of identity. This is a person who, for whatever reason, does not hold a birth certificate, passport or any other governmentissued identity document (such as an I.D. book or card) from any nation. This is not to be confused with the colloquial term ‘undocumented migrant,’ which in this guide we refer to as ‘irregular migrant.’ An irregular migrant is one who does not have legal immigration status or who entered a country without following proper immigration procedures. 2.6 Irregular migrant The term ‘irregular migrant’ in this guide refers to a migrant who does not have lawful immigration status or who entered a country without proper immigration procedures being followed. 2.7 Jus soli This is the Latin term for ‘right of the soil,’ which describes a system of law that grants nationality on the basis of birth on the territory.10 10 Manby (n 4 above) 32. Promoting citizenship and preventing statelessness in South Africa: A practitioner’s guide 9