There are reports of incidents where messages sent on social media disguised as vote requests from friends have led to LINE accounts being stolen. In particular, there are many confirmed cases where users receive direct messages asking them to vote for someone as a candidate or for a relative's child's work in a contest, which then lead them from a fake voting page to a fake LINE login screen.
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Someone else entered your information (e.g. verification code, phone number, password, account transfer code) on another device
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My LINE account was or may have been stolen