Signed and sealed
Definition 1 of 2
Pro Tip 1/3Official Completion
Indicates an agreement is fully authorized and nothing else is needed for it to be effective. 
Once the merger is signed and sealed, our companies will become one.
Pro Tip 2/3Beyond Discussion
Suggests that a decision or deal is final and not open for debate, question, or change. 
The terms are signed and sealed, so the project will commence next week.
Pro Tip 3/3Metaphorical Use
Can be used figuratively to express a strong level of certainty about an event or outcome. 
Our victory is signed and sealed; we just have to play the final game.