Stanton Friedman did a ton of research on these and firmly believed that a few of them were real.

Specifically, he was convinced the Eisenhower briefing document from 1952, the Truman Forrestal memo from 1947, and the Cutler-Twining memo of 1954 were all legitimate.  The Cutler-Twining memo is particularly interesting as it was pulled from the National Archives. It's a legit document to be sure.

The Black Vault updated their page on Stanton Friedman and Majestic just a few months ago. That link is below.

https://www.theblackvault.com/casefiles/update-on-operation-majestic-12-documents/

The Majestic docs can be found here. Scroll to bottom and there are links to them.

https://majesticdocuments.com/documents/

I find them fascinating. If real, among other things it sheds new light on why the government was out to take away Oppenheimer's security clearance. I mean, the bomb had already been created and the Soviets had theirs as well. Removing his clearance after the fact was just odd...., unless what they wanted him removed from was the ongoing investigation into UFO's.   It was a far bigger secret than the A bomb, which had already been revealed.

The link to the black vault article is really good. It's a very long and detailed analysis by Stanton Friedman as to the authentication of the three documents he believes are genuine. He also exposes the supposed MJ-12 documents he firmly believes are fakes and explains his reasoning on those as well.  

I suggest reviewing the black vault article and if you agree with Friedman's analysis, take a look at the three docs he references.  They are all short reads

Friedman had a tendency to believe anything that supported his opinion, ignoring any issues that might pop up. An example is the 5 year old Roswell witness that he defended long after everyone on both sides had stopped believing him.

About a 15 years ago at a MUFON symposium there was a presentation about the Pratt papers. Robert Pratt was a journalist who had done a lot of work with UFO's.

Back in the early 80's he was working on a book with Bill Moore and an unnamed third person known simply as "Sparrow" It was a fiction book about an OSI Sergeant who didn't believe in UFO's until he investigated the Ellsworth AFB case and later had his own UFO experience. The "hero" who was based on Sparrow of course, was recruited to work as part of a government disinformation scheme about UFO's, but after a while his conscience got to him and he worked to tell everyone the truth. He got caught and ended up dead on some far off planet. The name of the book was "Majic 12" and later "The Aquarius Project."

Moore had regular meetings with Sparrow and his unnamed boss a Colonel named "Falcon" where he would discuss topics for the book, get "new" info from Sparrow/Falcon and also talk about Moore's UFO research with his friend Stanton Friedman. Sparrow would turn around and create fake documents based on the info he received and give them to Moore, with some being intended for Paul Bennowitz.

The purpose of MJ-12/Majority 12/Majestic 12/Majic 12 was to cause infighting among the UFO community, and waste time and effort on useless nonsense. It worked excellently, especially on Stanton Friedman who would waste most of his life trying to prove MJ-12.

The Truman signature is a copy, if you zoom in you can see where they used white out to remove the "s" that he signed over in the original, along with being 3.6% larger it's an obvious forgery. The Eisenhower briefing was probably created by Moore, he discussed it with Pratt while writing the book, they came up with the details together, the dates are very unusual it's uses 09 April, 2024 instead of 9 April 2024. Adding a zero in front of a single digit wasn't done until the 80's and there is no reason to use a comma after the month. No examples of using the extra zero and comma exist from the time period, but Bill Moore typed the date that way. Did I mention that Moore had discussed with people the idea of creating fake documents to encourage witness's to come forward? That was during the book writing and before any of the MJ-12 stuff came out. The Cutler Twinning memo was planted, Moore and Friedman both received postcards telling them to look in a specific box during a classified document dump.

Moore claims he didn't tell anyone who the code names referred to, It seems Sparrow must have been surveilling him and incorrectly assumed he was Falcon. Our intrepid hero is none other than Mr "The Aliens love Tibetan music and Strawberry ice cream" himself, Richard C Doty.