Both copies will be required in court. A written statement that someone makes after promising officially to tell the truth.An affidavit can be used as proof in a law court. The Translator named above has agreed with the Client(s) named above to provide translation (written) and interpretation (spoken) language. Many translated example sentences containing "sworn affidavit" – Spanish-English dictionary and search engine for Spanish translations. The official website of the Federal Trade Commission, protecting America's consumers for over 100 years.