What service provides a mailing receipt and electronic verification of delivery or delivery attempts?

The correct option is Certified Mail because it is specifically designed to provide both a mailing receipt and electronic verification of delivery or delivery attempts. When sending something via Certified Mail, the sender receives a receipt at the time of mailing, which serves as proof that the item was sent. Additionally, the delivery process is tracked, and the sender can obtain electronic confirmation when the item is delivered or if delivery attempts were made but not successful. This makes it a preferred choice for important documents that require verification of receipt, such as legal notices or sensitive communications.

In contrast, while Priority Mail also provides some level of tracking and quicker delivery, it does not offer the same formal verification process that Certified Mail does. Standard Mail is typically used for bulk mailing and does not include tracking or delivery confirmation features. Express Mail, although it offers fast delivery and tracking, does not provide the same certification and receipt guarantees as Certified Mail.