1. No they don't.Everybody has a birth certificate and that certificate has a number on it.
Name, date of birth, place of birth, parents' names - that sort of thing. We don't have ID numbers - but those are not matters of language and the meaning of words. If the number on an Iranian birth certificate is also used as the number on an identity card you could also call it an "ID number".Okay. Thank you. What is written in your birth certificate? What is ID number?