How to fire people;
www.bbc.co.uk/news/business-39868820
It's not about you
Perhaps the most controversial section of Mr Trump's letter is its second paragraph.
This seemingly expressed gratitude to Mr Comey for telling him "on three separate occasions" that the President was exonerated from involvement in any Russian interference in the 2016 US election.
On social media this has been derided as "ham-fisted" and "self-serving".
Says Lucy Adams, it brings "an incredible new dimension of self-absorption" to the world of sacking people.
Rachel Suff was equally unimpressed. "I couldn't believe Donald Trump's letter. Not only was it short, but a big chunk of it was about himself
Thankfully this is very rare, she says, but adds it's important for bosses to remember that in employment, the balance of power is rarely equal.
"Resist using the situation for your own personal gratification.
Spokeswoman avoids answering why this bit was in the letter. Above her pay grade.