What is delivery report not requested?

A delivery report not requested (also known as an unsolicited delivery report) is a message notification sent by the recipient's mobile network to the sender, indicating that the message has been delivered. This type of delivery report is different from a requested delivery report, which is usually activated by the sender and requires the receiver's confirmation of receipt.

In some cases, mobile network providers automatically send delivery reports without the sender’s request or knowledge. For example, the network may send delivery reports when the message has been delivered to the recipient's device but not necessarily read or opened. Similarly, delivery reports may be sent even if the message failed to be delivered due to issues such as network congestion or low signal strength.

While unsolicited delivery reports can provide feedback on the status of a message, they may also cause confusion or annoyance for the sender, especially if they did not expect to receive them. Some messaging apps or mobile devices may allow users to disable unsolicited delivery reports to avoid unnecessary notifications.