A more thorough explanation:

Definition: Signed, sealed, and delivered is a phrase used in legal documents to indicate that the document has been signed by the person who needs to sign it, sealed to protect it from tampering, and delivered to the intended recipient.

For example, a contract between two parties may be considered legally binding once it has been signed, sealed, and delivered. This means that both parties have agreed to the terms of the contract, the document has been sealed to prevent any changes, and it has been delivered to the appropriate parties.

In a certificate of acknowledgment, the phrase "signed, sealed, and delivered" may be shortened to "sealed and delivered" to indicate that the person acknowledging the document has confirmed that it was executed by the appropriate party.

Another example of the use of this phrase is in the delivery of a package. Once a package has been signed for, sealed, and delivered to the recipient, it is considered to have been successfully delivered.

The examples illustrate that the phrase "signed, sealed, and delivered" is used to indicate that a legal document or package has been completed and delivered to the appropriate parties. It is a way to confirm that the necessary steps have been taken to ensure that the document or package is legally binding or has been successfully delivered.