Certified mail notice
A notice sent via the U.S. Postal Service requiring the signature of the recipient indicating that the posted item has been received. Certified mail differs from registered mail insofar as certified mail requires an executed return receipt by the recipient, while registered mail generates only a receipt by a postal official that the mailed item has been delivered to the address. Certified mail is an important and recognized service mechanism for foreclosure notices, and in certain situations, legal process.