A certified translation is one that has been formally verified by a licensed translator or translation company for use in official purposes. Certified translators attest that the target-language text is an accurate and complete translation of the source-language text. Certified translation of consent documents ensures that the tone, meaning and content of the translated documents remain consistent with the IRB-approved English version. When a translation is certified, both it and the original are accompanied by a signed statement from the translator attesting to the completeness and accuracy of the translation. This is then notarized by a notary public.