What documents do I need to bring when I go to sign in Spain?

The documents required vary from case to case. In principle, there are some documents that are mandatory for all applicants, which are a legalized and apostilled birth certificate, a legalized and apostilled criminal record certificate and a valid passport, which must be the same one with which the process was initiated. In case the birth certificate or criminal record is issued in a language other than Spanish, it must be translated and notarized before a Spanish consul, in which case the apostille is not required.