No, Instagram doesn't notify the person who posted the story if you take a screenshot of it. So you can screenshot their Ig story without them knowing.
As of now, Instagram doesn't give any indication to the story creator that someone has screenshot their story. This is different from some other features on Instagram like direct messages where you can see if someone has taken a screenshot of a disappearing photo or video. But for IG stories, it's private and the act of screenshotting remains unnoticed by the story's owner.
No. Instagram is designed in such a way that the privacy of the person taking the screenshot is maintained. When you take a screenshot of an IG story, the person who posted the story has no way of knowing. This is different from some other social media platforms where screenshot notifications are a thing. Here, on Instagram, you can capture and save a story for your own reference or to share it privately with someone else without the creator being aware.
Instagram has always been about sharing moments and stories. And currently, privacy settings regarding story screenshots are quite simple. There is no indication to the story creator that you've taken a screenshot. This is different from some other social media platforms where screenshot notifications exist. So, don't worry, you can screenshot IG stories privately for now.
Well, by default, Instagram doesn't have a feature that alerts users when their stories are screenshot. However, there are some third - party apps that claim to be able to detect screenshots, but these are not official Instagram features and often come with risks like violating Instagram's terms of use or being unreliable. So, for the most part, regular Instagram users won't know if you've screenshot their stories.