How do I know that the interpreter will keep information confidential?

How do I know that the interpreter will keep information confidential?

At ONCALL, we strictly adhere to the Code of Ethics of the Association of Sworn Translators of the City of Buenos Aires (Colegio de Traductores Públicos de la Ciudad de Buenos Aires). Translators and interpreters are required to keep all content of an assignment confidential. Upon induction, our interpreters sign a Confidentiality Agreement for all work undertaken, whether interpreting or translating.