COMMON If an agreement is signed and sealed or signed, sealed, and delivered, it is official and cannot be changed. Although a peace agreement has been signed and sealed, many villagers say they're afraid to return to their homes. A government spokesman said the bill must be signed, sealed and delivered by tomorrow. Note: In the past, documents were `sealed' with wax into which a special mark or design was pressed using a device called a seal. The mark or design in the wax proved that the document was authentic and had not been opened.