Coming full circle:I was recently hearing about all of the details British intelligence created for a fake dead sailor to make Operation Mincemeat work during World War II and it was really impressive. They didn't want the Axis to be able to find any details implausible.
On 29 September 1939, soon after the start of the Second World War, Rear Admiral John Godfrey, the Director of Naval Intelligence, circulated the Trout memo, a paper that compared the deception of an enemy in wartime to fly fishing. The journalist and author Ben Macintyre observes that although the paper was published under Godfrey's name, it "bore all the hallmarks of ... Lieutenant Commander Ian Fleming", Godfrey's personal assistant.
Yep, Bond’s creator was a small part of this, so probably well understood the need for every detail on the corpse to be believable.
To reinforce the impression of Martin being a real person, Montagu and Cholmondeley provided corroborative details to be carried on his person – known in espionage circles as wallet or pocket litter. These included a photograph of an invented fiancée named Pam; the image was of an MI5 clerk, Jean Leslie. Two love letters from Pam were included in the pocket litter, as was a receipt for a diamond engagement ring costing £53 10s 6d from a Bond Street jewellery shop. Additional personal correspondence was included, consisting of a letter from the fictitious Martin's father – described by Macintyre as "pompous and pedantic as only an Edwardian father could be" – which included a note from the family solicitor, and a message from Lloyds Bank, demanding payment of an overdraft of £79 19s 2d.