Which method is NOT acceptable for delivering customer notice?

The correct answer is the option that refers to notifying customers by email who have not consented to receive email notification. Consent is a critical component of compliance when it comes to communicating with customers, especially through electronic means. Without the customer's prior consent, sending an email notification may violate privacy regulations or laws that govern communications, such as the CAN-SPAM Act or GDPR, depending on the jurisdiction.

For other methods of notification, notifying customers verbally by telephone, notifying them in writing, and notifying those who have explicitly consented to receive emails conform to acceptable practices because they respect customer preferences and adhere to necessary regulations. Customer consent is fundamental in building trust and maintaining compliance, ensuring that communications are not intrusive and are welcome by the recipient.