Memento?
Glinda knew the shoes would get Dorothy home all along.
In ZOOLANDER, there comes a time when Jerry Stiller publicly takes a stand; like a dignified man of integrity, he declares that, yes, everything our hero has been saying about the villain is true. “I’m done,” he announces; “I’ve been in on it for years,” he explains – adding that he has “a head full of bad memories,” and that “it’s time to set things straight.” Which is to say, he specifies that he has a zip disk at his Long Island home, and that he can have the evidence here in minutes.
Now, since it’s Jerry Stiller, the effect largely goes down the toilet during the ensuing phone call: he starts bickering with his wife about how the traffic won’t be that big of a hassle if she just takes the service road and makes sure to get off before the bridge, and how he can heat up the damn casserole in the microwave later if she’ll just put it in a tupperware container now, and so on and forth. But it’s still obvious that incriminating evidence is on the way – prompting the Big Bad to flip out and turn the whole thing into a physical confrontation that our hero wins spectacularly.
Good call not spoiling the movie. When I read a spoiler that the eponymous book was a copy of the Bible in Braille, I could only conclude that there wasn’t any point in seeing the movie. Not even for Mila Kunis.
In the instance under discussion, it was more of a carte blanche. Which discusses the degree to which the bearer is privileged to be absolved from any penalty for the actions he has taken.
A “Death Warrant” usually bears the name of the person whose death is authorized by it.
Yes! :smack: I was looking for that term “Carte Blanche” thank you. Had to attempt to describe that the best I could, not so good with my French and I did forget my Spanish, that item is known in many countries as “Carta Blanca”.
https://www.theguardian.com/notesandqueries/query/0,5753,-21343,00.html
What I was also trying to say early is that a death warrant has the names of the people the executioners were ordered to take care of, the Carte Blanche had no specific names and it was used to grant the bearer of it to all powers of the state, even to kill anyone deemed to be an enemy of the king or queen.
Nowadays the term is used in financial documents and mostly referring to blank checks and Mexican beer. 
- D’artagnion still kept the letter after he had used it before to complete his early mission.
Since it looks like we’re having trouble coming up with many direct examples, I’ll offer another one that kinda sorta fits. In Sleepers, the priest played by Robert DeNiro apparently has a habit of keeping the ticket stubs from ballgames he goes to. This, along with the priest’s somewhat flexible interpretation of the Ninth Commandment, comes in handy in the trial.
Oh, I’ve got another one, but it’s so spoiler-tastic that I’ll spoiler even the title:
[spoiler]WITNESS FOR THE PROSECUTION.
Seems the defendant’s only real witness will be his German-born wife – who’ll testify he was with her during the murder, because of course she would, right? That’s not worth much. But she instead testifies that, no, he came home late that night and covered in blood! So he’s screwed – until a Brit gives the defense attorney some letters written by said wife, including one laying out her plan to weave a noose of perjury around his neck so she can be with her beloved!
So she’s obviously lying! And he’s obviously innocent! And, technically, it’s all because that Brit kept those letters. And that counts, since that Brit was only ever the German-born wife herself, with a cheap wig and a fake accent.[/spoiler]