MTA:SA anti-cheat code
MTA:SA anti-cheat code VF#21
A verification failure listed under a changed gta_sa.exe.
How to fix it
Use a clean GTA: San Andreas
MTA needs an unmodified GTA installation. If mods, an ASI loader or a replaced gta_sa.exe are in the game folder, reinstall GTA into a fresh folder and let MTA use that copy.
Use the official client and clean game files
Install MTA from multitheftauto.com and keep GTA unmodified. Trainers, injected DLLs and patched game files are exactly what these checks look for.
Read the whole message, then the official page
The number names a detection category, not a program on your computer. MTA's anti-cheat guide lists what each category covers, and the full message is what tells you which case you are in.
If you were banned, appeal where it was issued
A server ban is appealed on that server. An MTA global ban is appealed through MTA's own process. Keep the full message: it names who issued it. On CIT, appeals are posted on the forum, not in game: a ban, limit ban, fullmute ban or a mute over 3 days goes to the Bans Issued board (cit.gg/index.php?board=626.0), other punishments to the Punishment Appeals board (cit.gg/index.php?board=600.0). If you cannot use the forum, ask someone to post it for you.
Still not fixed? Copy the whole message, not only the code, and check your log in the Fix tool. It is read on your own computer.
About this code
A patched or "cracked" game executable raises this. MTA needs the original file.
VF is a second anti-cheat prefix, used for verification failures such as changed game files or a trainer. The number names a published category, nothing more. MTA's own documentation gives VF#21 as Altered gta_sa.exe.
All fix guides · Every MTA:SA error code · Crash codes and offsets
Where this comes from
Read on 5 September 2026 and written in our own words here.