Final answer:
The client must sign an informed consent document before undergoing electroconvulsive therapy (ECT), ensuring they have been provided with all relevant information about the treatment to make an informed decision.
Step-by-step explanation:
The client must sign an informed consent document before undergoing electroconvulsive therapy (ECT). Informed consent is a process that ensures the client has been provided with all relevant information about the treatment, including potential risks and benefits, so they can make an informed decision. The client's request to have a family member help them decide highlights the importance of the client's autonomy in the decision-making process.