What must interpreters obtain from consumers before involving an intern in an assignment?

The correct answer is consent. Interpreters are professionals who must adhere to established ethical guidelines, which prioritize transparency and respect for the rights of the consumers they serve. Obtaining consent is essential when involving an intern in an assignment because it ensures that consumers are fully aware of and agree to the presence of an intern who may be less experienced. This practice upholds the principle of consumer autonomy, promoting informed decision-making and fostering trust in the interpreting process.

While the other options may seem relevant in different contexts—such as payment confirmation being important for contractual agreements or safety approval in certain sensitive settings—consent specifically addresses the ethical obligation to involve the consumer in decisions regarding their interpretation services. Ensuring informed consent is paramount for maintaining professional integrity and respecting the needs of the consumers.