Some might call it the plain truth -- others, the plane truth.
The sarcastic open letter to LIAT Airlines first appeared in The BVI Beacon, a newspaper in the British Virgin Islands, in April, but caught Branson's attention last week.
"How to write a complaint letter -- read this hilarious note from a frustrated airline passenger," Branson tweeted.
In the letter, the writer Arthur Hicks comes out swinging.
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"May I say how considerate it is of you to enable your passengers such an in-depth and thorough tour of the Caribbean," Hicks begins.
"Most other airlines I have travelled on would simply wish to take me from point A to B in rather a hurry. I was intrigued that we were allowed to stop at not a lowly one or two but a magnificent six airports yesterday."
"And who wants to fly on the same airplane the entire time? We got to change and refuel every step of the way!"
Hicks goes on to say how much he enjoyed sampling the security scanners at each airport and the pat downs too.
"I feel as if I've been hugged by most of the Caribbean already," he writes.
The letter closes with a curt: "P.S. Keep the bag. I never liked it anyway."
Disgruntled customers regularly say LIAT stands for Languishing In Airport Terminals, Luggage In Another Terminal or Leaving Island Any Time.
Branson found himself on the receiving end of a similar stinging e-mail in 2008 in which a customer said his flight from Mumbai, India, to London was "the culinary journey of hell," and one that resembled a crime scene -- "A CRIME AGAINST BLOODY COOKING."
"(M)aking customer service key to your company will keep your employees motivated and your customers happy. This in turn ensures enduring loyalty, business success and a better experience for everyone."