They can get hold of this information through various online and offline methods.
This is not an indication of a security issue such as a virus or attack.
Here are some ways you can confirm the identity of your online dating match.
Because there is such a high demand for safety precautions among online daters, many platforms have implemented features that make it easier for daters to know if their matches are as promising as they seem to be.
A paper published online in February in Management Science finds that on the whole, this feature backfires.
The researchers selected 100,000 users of a large online dating site and gave half of them the ability to browse anonymously, which usually costs extra.