Why was I VAC banned?
VAC bans are applied when an account, or an account using the phone number tied to other accounts, connects to a VAC-secured server while running cheat software.

Valve Anti-Cheat regularly checks the game files of all users connected to Valve's servers to ensure third party software is not being used which gives players an advantage. If software of this kind is detected a VAC ban will be issued.

Can you tell me what program or software caused my VAC ban?
No. We do not disclose the cheats that were detected while connected to a VAC-secured server that resulted in a VAC ban. We have detailed records for each VAC ban, however, releasing this information would only benefit cheat developers. The VAC team regularly investigates claims of false VAC bans to increase the effectiveness of Valve Anti-Cheat.

Can I appeal my VAC ban?
No. VAC bans cannot be appealed. If a VAC ban is issued incorrectly it will be automatically removed after investigation, but Steam Support does not manually remove VAC bans applied to accounts for any reason.