diff --git a/src/cmake/compiler/clang/settings.cmake b/src/cmake/compiler/clang/settings.cmake
index 93e85762e..92b95cb47 100644
--- a/src/cmake/compiler/clang/settings.cmake
+++ b/src/cmake/compiler/clang/settings.cmake
@@ -131,7 +131,7 @@ if(BUILD_SHARED_LIBS)
         -fvisibility=hidden)
 
     # --no-undefined to throw errors when there are undefined symbols
-    # (caused through missing WARHEAD_*_API macros).
+    # (caused through missing ACORE_*_API macros).
     set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} --no-undefined")
 
     message(STATUS "Clang: Disallow undefined symbols")
diff --git a/src/cmake/compiler/gcc/settings.cmake b/src/cmake/compiler/gcc/settings.cmake
index a5fe2c33e..8723a6043 100644
--- a/src/cmake/compiler/gcc/settings.cmake
+++ b/src/cmake/compiler/gcc/settings.cmake
@@ -67,7 +67,7 @@ if(BUILD_SHARED_LIBS)
     INTERFACE
       -fvisibility=hidden)
 
-  # Should break the build when there are WARHEAD_*_API macros missing
+  # Should break the build when there are ACORE_*_API macros missing
   # but it complains about missing references in precompiled headers.
   # set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -Wl,--no-undefined")
   # set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wl,--no-undefined")
diff --git a/src/cmake/macros/ConfigInstall.cmake b/src/cmake/macros/ConfigInstall.cmake
index 836ec610c..090e3dba2 100644
--- a/src/cmake/macros/ConfigInstall.cmake
+++ b/src/cmake/macros/ConfigInstall.cmake
@@ -73,7 +73,7 @@ endfunction()
 
 #
 # Use it like:
-# CopyModuleConfig("warhead.conf.dist")
+# CopyModuleConfig("acore.conf.dist")
 #
 
 function(CopyModuleConfig configDir)
diff --git a/src/common/Cryptography/TOTP.h b/src/common/Cryptography/TOTP.h
index 01b2a53bd..ddcaf7573 100644
--- a/src/common/Cryptography/TOTP.h
+++ b/src/common/Cryptography/TOTP.h
@@ -15,8 +15,8 @@
  * with this program. If not, see <http://www.gnu.org/licenses/>.
  */
 
-#ifndef WARHEAD_TOTP_H
-#define WARHEAD_TOTP_H
+#ifndef ACORE_TOTP_H
+#define ACORE_TOTP_H
 
 #include "Define.h"
 #include <ctime>
diff --git a/src/common/Encoding/Base32.cpp b/src/common/Encoding/Base32.cpp
index 1a663a46e..8906e0eaf 100644
--- a/src/common/Encoding/Base32.cpp
+++ b/src/common/Encoding/Base32.cpp
@@ -1,6 +1,18 @@
 /*
- * Copyright (C) 2016+  AzerothCore <www.azerothcore.org>, released under GNU AGPL v3 license: https://github.com/azerothcore/azerothcore-wotlk/blob/master/LICENSE-AGPL3
- * Copyright (C) 2021+  WarheadCore <https://github.com/WarheadCore>
+ * This file is part of the AzerothCore Project. See AUTHORS file for Copyright information
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU Affero General Public License as published by the
+ * Free Software Foundation; either version 3 of the License, or (at your
+ * option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU Affero General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program. If not, see <http://www.gnu.org/licenses/>.
  */
 
 #include "Base32.h"
diff --git a/src/common/Encoding/Base32.h b/src/common/Encoding/Base32.h
index 68c8be463..1f15212c1 100644
--- a/src/common/Encoding/Base32.h
+++ b/src/common/Encoding/Base32.h
@@ -1,10 +1,22 @@
 /*
- * Copyright (C) 2016+  AzerothCore <www.azerothcore.org>, released under GNU AGPL v3 license: https://github.com/azerothcore/azerothcore-wotlk/blob/master/LICENSE-AGPL3
- * Copyright (C) 2021+  WarheadCore <https://github.com/WarheadCore>
+ * This file is part of the AzerothCore Project. See AUTHORS file for Copyright information
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU Affero General Public License as published by the
+ * Free Software Foundation; either version 3 of the License, or (at your
+ * option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU Affero General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program. If not, see <http://www.gnu.org/licenses/>.
  */
 
-#ifndef WARHEAD_BASE32_H
-#define WARHEAD_BASE32_H
+#ifndef ACORE_BASE32_H
+#define ACORE_BASE32_H
 
 #include "Define.h"
 #include "Optional.h"
diff --git a/src/common/Encoding/Base64.cpp b/src/common/Encoding/Base64.cpp
index 1e5c1968e..ee37be530 100644
--- a/src/common/Encoding/Base64.cpp
+++ b/src/common/Encoding/Base64.cpp
@@ -1,6 +1,18 @@
 /*
- * Copyright (C) 2016+  AzerothCore <www.azerothcore.org>, released under GNU AGPL v3 license: https://github.com/azerothcore/azerothcore-wotlk/blob/master/LICENSE-AGPL3
- * Copyright (C) 2021+  WarheadCore <https://github.com/WarheadCore>
+ * This file is part of the AzerothCore Project. See AUTHORS file for Copyright information
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU Affero General Public License as published by the
+ * Free Software Foundation; either version 3 of the License, or (at your
+ * option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU Affero General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program. If not, see <http://www.gnu.org/licenses/>.
  */
 
 #include "Base64.h"
diff --git a/src/common/Encoding/Base64.h b/src/common/Encoding/Base64.h
index 8fe7cf0d5..b1cb7b18f 100644
--- a/src/common/Encoding/Base64.h
+++ b/src/common/Encoding/Base64.h
@@ -1,10 +1,22 @@
 /*
- * Copyright (C) 2016+  AzerothCore <www.azerothcore.org>, released under GNU AGPL v3 license: https://github.com/azerothcore/azerothcore-wotlk/blob/master/LICENSE-AGPL3
- * Copyright (C) 2021+  WarheadCore <https://github.com/WarheadCore>
+ * This file is part of the AzerothCore Project. See AUTHORS file for Copyright information
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU Affero General Public License as published by the
+ * Free Software Foundation; either version 3 of the License, or (at your
+ * option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU Affero General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program. If not, see <http://www.gnu.org/licenses/>.
  */
 
-#ifndef WARHEAD_BASE64_H
-#define WARHEAD_BASE64_H
+#ifndef ACORE_BASE64_H
+#define ACORE_BASE64_H
 
 #include "Define.h"
 #include "Optional.h"
diff --git a/src/common/Encoding/BaseEncoding.h b/src/common/Encoding/BaseEncoding.h
index 8ae0673d3..ed1ea96ec 100644
--- a/src/common/Encoding/BaseEncoding.h
+++ b/src/common/Encoding/BaseEncoding.h
@@ -1,10 +1,22 @@
 /*
- * Copyright (C) 2016+  AzerothCore <www.azerothcore.org>, released under GNU AGPL v3 license: https://github.com/azerothcore/azerothcore-wotlk/blob/master/LICENSE-AGPL3
- * Copyright (C) 2021+  WarheadCore <https://github.com/WarheadCore>
+ * This file is part of the AzerothCore Project. See AUTHORS file for Copyright information
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU Affero General Public License as published by the
+ * Free Software Foundation; either version 3 of the License, or (at your
+ * option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU Affero General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program. If not, see <http://www.gnu.org/licenses/>.
  */
 
-#ifndef WARHEAD_BASE_ENCODING_HPP
-#define WARHEAD_BASE_ENCODING_HPP
+#ifndef ACORE_BASE_ENCODING_HPP
+#define ACORE_BASE_ENCODING_HPP
 
 #include "Define.h"
 #include "Optional.h"
diff --git a/src/server/apps/worldserver/Main.cpp b/src/server/apps/worldserver/Main.cpp
index b2087448a..f8f98ac6a 100644
--- a/src/server/apps/worldserver/Main.cpp
+++ b/src/server/apps/worldserver/Main.cpp
@@ -431,7 +431,7 @@ int main(int argc, char** argv)
 
     // 0 - normal shutdown
     // 1 - shutdown at error
-    // 2 - restart command used, this code can be used by restarter for restart Warheadd
+    // 2 - restart command used, this code can be used by restarter for restart AzerothCore
 
     return World::GetExitCode();
 }
diff --git a/src/server/game/Battlegrounds/Arena.h b/src/server/game/Battlegrounds/Arena.h
index 0be78b705..fd7460080 100644
--- a/src/server/game/Battlegrounds/Arena.h
+++ b/src/server/game/Battlegrounds/Arena.h
@@ -63,4 +63,4 @@ private:
     void EndBattleground(TeamId winnerTeamId) override;
 };
 
-#endif // WARHEAD_ARENA_H
+#endif // ACORE_ARENA_H
diff --git a/src/server/game/Battlegrounds/ArenaScore.h b/src/server/game/Battlegrounds/ArenaScore.h
index b51dacf95..d29c1487c 100644
--- a/src/server/game/Battlegrounds/ArenaScore.h
+++ b/src/server/game/Battlegrounds/ArenaScore.h
@@ -72,4 +72,4 @@ protected:
     std::string TeamName{};
 };
 
-#endif // WARHEAD_ARENA_SCORE_H
+#endif // ACORE_ARENA_SCORE_H
diff --git a/src/server/shared/Secrets/SecretMgr.h b/src/server/shared/Secrets/SecretMgr.h
index 9dad19921..8e891aa02 100644
--- a/src/server/shared/Secrets/SecretMgr.h
+++ b/src/server/shared/Secrets/SecretMgr.h
@@ -15,8 +15,8 @@
  * with this program. If not, see <http://www.gnu.org/licenses/>.
  */
 
-#ifndef __WARHEAD_SECRETMGR_H__
-#define __WARHEAD_SECRETMGR_H__
+#ifndef __ACORE_SECRETMGR_H__
+#define __ACORE_SECRETMGR_H__
 
 #include "BigNumber.h"
 #include "Common.h"