Fabricated memoirs
I'm thinking specifically of Frey (of course), as well as JT Leroy, who wrote memoir-disguised-as-fiction using a fake identity, all the time insisting that the memoir-disguised-as-fiction books she wrote were based on the fake JT Leroy's life. I'm also thinking of Kaavya Viswanathan (who granted, wrote fiction, but got caught plagiarizing other authors and had her plagiarized book yanked from shelves (for which she'd received a half-million dollar deal) right around the same time the Frey scandal broke.
There was also the memoir "by" the nonexistent person Anthony Goodby Johnson called "A Rock and a Hard Place: One Boy's Triumphant Story", which became a NYT bestseller despite the fact its supposed author did not actually exist, and therefore could not be considered a memoir (it was a complete fabrication, to the point that there was a Dateline NBC investigation on who actually wrote it, and why). The investigation found that a retired schoolteacher who claimed to be Goodby Johnson's adoptive mother wrote the "memoir" as a fabrication; in reality she had no children, and posed as her nonexistent "son" on the phone with editors.
Lastly, there was the "Nasdijj" scandal, in which three memoirs supposedly written by a Navajo Indian with fetal alcohol syndrome turned out to be fabrications written under a false identity. That hoax was perpetrated (to his great financial reward) by a white guy from North Carolina named Timothy Patrick Barrus, and I believe the author's fraud was ultimately exposed by Vanity Fair magazine.
The issue surrounding Burroughs' book is indeed a case of the people involved in his true story being upset about how they were portrayed, and they are suing based on "breach of privacy", though it seems unlikely they will win. Still, that case, along with all the above complete fabrications, makes publishers' legal departments hypervigilant about verifiability in memoir.//