{adj. phr.} Finished; completed; in a state of completion. * /"How is the campus renovation plan for the governor's office coming along?" the dean of the college asked. "Signed, sealed, and delivered," his assistant answered./ Compare: CUT AND DRIED; HOOK, LINE AND SINKER.
SIGNED, SEALED, AND DELIVERED
Meaning of SIGNED, SEALED, AND DELIVERED in English
Dictionary of English idioms . Словарь английских идиом. 2012