What must the authorized representative or POA sign on the application?

The correct answer focuses on the necessity for the authorized representative or Power of Attorney (POA) to provide an attestation that confirms their ability to act on behalf of the consumer. This is crucial because it ensures that the representative has the legal authority to make decisions or provide information regarding the consumer’s health care coverage or other protected personal data.

By signing an attestation, the representative affirms their role and their understanding of the responsibilities they hold in representing the consumer's interests. This formal acknowledgment not only protects the consumer but also provides a legal framework for the representative's actions, thus ensuring adherence to privacy laws and regulations surrounding health care information.

The other options, while relevant to various contexts, do not encapsulate the primary responsibility of the authorized representative to confirm their capacity to act for the consumer.