If you need to report someone you've already matched with:

Steps to Report from Chats:

Navigate to the Chats tab in the bottom navigation.
Open the conversation with the person you want to report.
Tap the three dots icon located in the top right corner of the chat screen.
Select Report from the menu options.
Choose the reason that best describes why you're reporting this person.

Please note: Reporting someone from your Chats will immediately remove them from your view and remove you from theirs. The entire conversation history and match will be permanently deleted and cannot be recovered.

For more on reporting from a profile or alternative ways to report, see Reporting Incidents on OtterHalf.