A more thorough explanation:

Definition: Sealed and delivered is a phrase used to indicate that a legal document has been signed and delivered to the intended recipient.

For example, when a contract is signed by both parties and then physically delivered to each party, it is considered to be sealed and delivered. This phrase is often used in the context of a certificate of acknowledgment, which is a statement that the instrument was executed by the person acknowledging it.

Here is an example of how the phrase might be used in a sentence:

"After months of negotiations, the contract was finally sealed and delivered to both parties."

This example illustrates how the phrase is used to indicate that a legal document has been signed and delivered to the intended recipient.