Marie Kondo is not sparking joy for this celebrity organizer in Los Angeles.
Linda Koopersmith has been in the tidying up business for decades. She's known as "The Beverly Hills Organizer," with clients like Chrissy Teigen and Serena Williams, and she's taking aim at Kondo, claiming the consultant and author stole a folding technique that she invented.
Koopersmith claims she came up with the "upright fold" and that Kondo has been capitalizing on it and presenting it as her own.
The "upright fold" is all about folding clothes in a way that they can sit up in a drawer so you can see everything your own — instead of looking at stacks of hidden items.
Koopersmith said she invited the fold in 1991, later featuring it on the Style network's "Clean House" and in her 2005 book, "The Beverly Hills Organizer's Home Organizing Bible."
When asked how she felt seeing Kondo use the technique so prominently, Koopersmith told Inside Edition, "I couldn't believe it. ... I felt very violated."
Koopersmith said she isn't take legal action against Kondo, but she does want to be recognized for the work she spent decades doing.
"It's important to me that everybody in the world knows. I'm the creator of this fold," she said.
Kondo did not respond to Inside Edition's request for comment.