Dota 2 Support / Valve Anti-Cheat (via official channels)
[Example: 1234567890]
[Name or profile link if available]
Here’s a template you can use to report cheating in Dota 2 (note that version 1.26 is very old — modern Dota 2 is updated regularly): Report of Suspected Cheating / Hack Use — Match ID [insert ID] Funs Dota Hack 1.26 Zipperton ru
[Insert date and time]