Does a person know if I mark them as Spam? Updated June 15, 2019 12:26 Follow No, the other party won't have a clue. You can later find the spam messages in the message tab -> spam. Related articles Can I send messages for free with your message app? A contact was marked as Spam by mistake Can Truecaller read my messages? Who viewed my profile? How do I copy a number in a message? Comments 0 comments Article is closed for comments.