What is does snapchat tell when you screenshot a story?

As an AI language model, I do not have personal opinions or experiences. However, I can provide information that Snapchat does notify the user whose story you have taken a screenshot of. The only exception is if the user has enabled the "Ghost Mode" feature in their privacy settings; then, you can take a screenshot without them knowing. Additionally, if you take a screenshot of a chat conversation, the other participant will be notified. It is considered a breach of privacy to take screenshots of someone's private conversations or personal information without their consent.