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When a DayZ player is kicked for a failed signature check on a modded server, the server couldn’t verify that player’s mod files. The usual cause is a mod whose .bikey key file isn’t in the server’s keys folder, or a player and server running different versions of a mod. Copy every mod’s .bikey into keys, make sure the server and players use the same mod versions, and restart.

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What is the DayZ signature check?

Each mod comes with signature files (.bisign) and a public key (.bikey). The server setting verifySignatures = 2 checks that the files players load are signed by a key in the server’s keys folder. Only 2 is supported; 0 turns the check off. On our panel this is Verify mod signatures in Game settings (shown with Show advanced settings).

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How to fix signature kicks as a server owner

1

List your mods

Note every mod the server runs: the ones in your modlist.html, Extra client mods and Server-side mods.
2

Check the keys folder

In Files, open keys in the main folder. For each mod there must be a .bikey file.
3

Copy missing keys

Open the mod’s folder (for example @CF), then its keys or Keys folder, and copy the .bikey into the main keys folder. Mods sometimes rename their key after an update, so check again after updates.
4

Restart the server

Restart so the server loads the keys and the newest mod versions.

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How players fix a signature kick

If only one player is kicked, the problem is on their PC:
  1. Unsubscribe from the mod in the Steam Workshop and subscribe again, so Steam downloads a fresh copy.
  2. In Steam, verify DayZ’s game files: right-click DayZ > Properties > Installed Files > Verify integrity of game files.
  3. Join again from the launcher so it loads the server’s mod list.

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Should you set Verify mod signatures to 0?

No. With the check off, players can join with modified game files, which opens the door to cheats. Fix the keys instead.

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Frequently asked questions

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Where is the keys folder on a DayZ server?

In the main folder, next to serverDZ.cfg. Each mod also has its own keys folder inside the mod folder.

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What does verifySignatures = 2 mean?

It turns the signature check on. Bohemia supports only the value 2; 0 turns the check off.

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Why do players get kicked right after a mod update?

Players got the new version from the Workshop before the server did, or the other way round. Restart the server and have players update in the launcher.

DayZ server guide

Every DayZ page in one place.

Install mods

Mod list and server-side mods.

DayZ server settings explained

Verify mod signatures and more.

Read server logs

Find the kick reason.

Install DayZ Expansion

Keys for Expansion mods.
Tested by the FREAKHOSTING team on 30 October 2026 (DayZ stable branch on our Game Panel). Steps may differ slightly if the game or its mods change.

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Need Extra Help?

If you encounter any issues, our support team is ready to assist:

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Last Updated: October 2026