What happens if the item marked "Unable to Forward" is picked up by the recipient?

When an item is marked "Unable to Forward," it indicates that the postal service is unable to redirect the mail to a new address, usually because the recipient has moved without providing a forwarding address, or because the item is not eligible for forwarding. Therefore, when the intended recipient picks up the item, they can simply keep it as it is. This is a fundamental aspect of mail handling; once the recipient has taken possession, they assume ownership of the item.

In contrast, options regarding redelivery, contacting customer service, or forwarding imply further action that isn't applicable to mail marked with "Unable to Forward." The marking essentially means the item is meant to be returned to the recipient without any additional procedures.