Reducing Undeliverable Mail and Increasing Mail Delivery Rates
Postal items that cannot be delivered to the receiver because of problems such an erroneous address, insufficient postage, or the recipient's unavailability are referred to as undeliverable mail. If a return address is given, these items are usually mailed back to the sender; if not, they are usually forwarded to a dead letter office. Address errors, out-of-date forwarding information, or recipient denial are common causes. Usually, updating or correcting postal information is necessary to resolve such problems.