Princess Diana and Prince Charles had a tumultuous relationship, and there were rumors suggesting that the Princess of Wales feared for her life while she was married to the future King.

In 2003, Princess Diana’s former royal butler, Paul Burrell, claimed in his “Royal Duty” book that his former boss sent him a note and asked him to keep it just in case.

According to Burrell, Princess Diana feared for her safety, and she also became extremely paranoid that Prince Charles was plotting to have her killed so he could wed Camilla Parker Bowles.

“This particular phase in my life is the most dangerous – my husband is planning ‘an accident’ in my car, brake failure, and serious head injury,” Princess Diana allegedly wrote.

Even though the handwritten letter was already shown at the Royal Courts of Justice, and it was indeed written by Prince William and Prince Harry’s mom, it seems that Burrell may also have lied about it.

One of Princess Diana’s close friends, Lucia Flecha da Lima, said that she doesn’t think Princess Diana would writing something like that.

“I still don’t believe it. Paul Burrell was perfectly capable of imitating Princess Diana’s handwriting… I don’t believe she was fearing for her life, especially from Prince Charles, the future King of the country,” da Lima said.

Meanwhile, da Lima is not the only person who has accused Burrell of lying. Lord Justice Scott Baker previously said that the “I’m A Celebrity… Get Me Out of Here” alum lied in the witness box.

In the past, Burrell has also been accused of cashing in on his former boss. During an episode of the Australian reality TV show, the butler also talked about Princess Diana’s letter.

After the episode aired, several people took their thoughts to Twitter to question Burrell’s credibility. One of them said that he keeps talking about the Princess of Wales because he wants to make money off of her.

Prince Charles and Princess Diana Prince Charles and Princess Diana are pictured attending a centenary service for the Royal College Of Music on Feb. 28, 1982 at Westminster Abbey, London. Photo: Fox Photos/Hulton Archive/Getty Images