"Our dear daughter, sister and friend has left us today in sorrow," the obit in the Goteborgs-Posten newspaper in Gothenburg read, The Local.se reported Wednesday.
"My first thought was that this couldn't be happening and that I had to call my mother but I couldn't ring her because I knew I'd start crying," the woman said.
The newspaper said someone claiming to be the woman's father called in the obituary and a woman who said she was the victim's sister confirmed the death by phone the same day.
In the future, the paper's editor said people providing obituaries will have to include a death certificate.
It wasn't clear why the woman was targeted.
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