Compromising Memoirs

When a person of note has reached their autumn years they are often taken to compose their Memoirs, a record of their life for the perusal and study of those who would wish to emulate it.

In fiction such a document is often something that others would wish was not written. It often contains details that others wish lay forgotten, such as past scandals or a dodgy deal that no one found out about. As such there is often a plot revolving around stopping/protecting the Memoirs.

This covers Memoirs as a plot device, not a framing device. However there can be overlap. For example one of the Sherlock Holmes short stories starts with a note to the effect that, while he has no interest in publishing a specific case due to the scandal it will cause he WILL if people keep trying to steal his notes, meaning that someone in universe considers his writings to be an example.

Examples of Compromising Memoirs include:

Comic Books

The reactions to Nite Owl I's "Under the Hood" in Watchmen were like this.

Film

In Atonement, Briony states that she would have to wait until after her cousin Lola died before she could publish her memoirs, specifically, the truth about who really raped Lola and the fates of Cecilia and Robbie.
A subversion of this trope is the basis for the Idiot Plot in Burn After Reading. A self-important disgruntled CIA agent plans to release his memoirs, which are probably not as scandalous to the agency as he believes. But then a bunch of other people mistake the memoirs for "valuable spy stuff".
Kind Hearts and Coronets: Louis's memoirs, written in prison and left behind there, reveal that he has murdered most of the d'Ascoyne family.
- Louis only wrote the memoirs because he was waiting to be executed for a murder he didn't commit. When he was reprieved, he forgot and left them in his cell. Big oops.

Literature

In Jeeves and Wooster, Sir Watkin writes his Memoirs and SEVERAL parties take offense at the depiction of the now respectable pillars of society as the kind of roaring youths that would not have gone out of place in the Drones Club. Oddly enough, this does not include most of the people so depicted, who seem to like the idea that the youth may recall that they too were young once.
As mentioned above, the Sherlock Holmes story "The Adventure of the Veiled Lodger" begins with Watson saying that if the person who tried to get at his case-notes does it again, he will reveal the whole story of "the politician, the lighthouse, and the trained cormorant" to the public.
Ciaphas Cain's unofficial memoirs are classified and available only to inquisitors. His official ones are apparently propaganda and nonsense.

Live Action Television

In Yes Prime Minister, the former Prime Minister writes his memoirs and Hacker tries to bar the parts that make him look bad from publication.
- The crisis is resolved the next episode by the sudden death by heart attack of the former PM; this turns a disaster (the former PM's memoirs) into an opportunity (Hacker has an excuse to hold a big funeral and get some diplomatic business done). It also pleases Hacker immensely; for a moment after receiving the news, Hacker breaks out into one of the sincerest, happiest grins you'll ever see.
The Spooks episode "The Rose Bed Memoirs".
An episode of The Persuaders.
In "Mr. Monk and the Astronaut", Monk at first thinks the motive for the murder is that the astronaut had an affair with the victim, an actress, but it turns out his wife knows all about the affair and has forgiven him. Then Monk finds out that when they were seeing each other, the astronaut once beat the actress so badly she ended up in the hospital, and she was going to reveal it in her memoirs.
On It Takes a Thief, "Lay of the Land", Al is assigned to steal the memoirs of a duchess who really got around in her day, just in case one of her prominent lovers let slip any state secrets. Subverted when it turns out that her memoirs are actually rather tame; she was going to have them published posthumously, and in the meantime spreading rumors about their scandalous contents helped drum up publicity (and increase her advance). Discovering this, foreign agents hold her niece hostage and force her to write in a few new chapters to make Western powers look bad.
Very briefly used on The West Wing. As President Bartlett is just about to leave office, there's a train crash and two state governors squabble about who has to deal with it. Bartlett calls one of them and threatens that he's about to earn a paragraph in his soon to be written memoirs. The governor immediately backs down.