Yes, Snapchat notifies the user if someone takes a screenshot of their snap story. This is to protect the privacy of the content creator. However, there are some exceptions. For example, if the story is set to expire very quickly, the screenshot notification might not work properly.
Yes, Snapchat can notify the sender if you take a screenshot of their Snap story. It's a privacy feature to protect the content shared on the platform.
Generally, people can't find out if you screenshot their Snap Map story. However, it's always best to respect others' privacy and only screenshot if it's appropriate and within the app's terms of use.