[2021] Where should I send the evidence of cheaters?

If you've made an in-game report (this is mandatory), then please send additional evidence to Support. For cheating/hacking etc that would need to be in the form of video evidence.

This is a direct link to the Support ticket that you would need to make: https://support.deadbydaylight.com/hc/en-us/requests/new?ticket_form_id=360000942011