A woman in China's Taiwan province has been granted a divorce, using the "Read" indicators on the Line messages she had sent to her husband as proof that he had been ignoring her.
The app showed he had opened the text messages, but didn't reply to any of them.
A judge ruled in her favour earlier this month.
It's called "blue-ticking" - a term that refers to the act of reading but not replying to someone's messages. The concept comes from social media apps such as WhatsApp and Line, which use tick notifications to show when someone has received and read your message.
http://www.bbc.co.uk/news/world-asia-40632435