Taiwan (Local) Birth Certificate, Issuance+Notarization+MOFA+Korea Representative Office authentication

The Birth Certificate was issued outside the Apostille Convention, so it is taken all the way through — local notarisation, Ministry of Foreign Affairs confirmation, and finally consular legalisation at the Korean mission in Taiwan.

Taiwan (new application for issuance)

official issuance of the Birth Certificate by the competent authority in Taiwan + notarisation before a local notary in Taiwan + Apostille certification in Taiwan + consular legalisation at the Korean Representative Office in Taiwan (issued outside the Apostille Convention, so consular legalisation at the Korean mission is the final step)

proof of family relationship for immigration and green card applications in the U.S. and other countries, proof of lineage for dual citizenship and citizenship-by-descent applications, birth registration and civil-status corrections abroad, age and identity verification for school enrollment and transfers abroad, proof of identity for international marriage registration, spouse and child sponsorship visa applications, passport and ID card applications abroad, proof of heirship in international inheritance proceedings, family relationship checks for insurance enrollment and beneficiary designation abroad, identity documentation for intercountry adoption, claims for pensions and social security benefits abroad, age verification for sports leagues and competitions abroad, legal procedures for name or date-of-birth corrections, family accompaniment screening for long-stay visas etc..