diff --git a/dGame/dGameMessages/GameMessages.cpp b/dGame/dGameMessages/GameMessages.cpp
index 595444e9..8c935afe 100644
--- a/dGame/dGameMessages/GameMessages.cpp
+++ b/dGame/dGameMessages/GameMessages.cpp
@@ -625,6 +625,25 @@ void GameMessages::SendUIMessageServerToSingleClient(Entity* entity, const Syste
 	SEND_PACKET;
 }
 
+void GameMessages::SendUIMessageServerToSingleClient(const std::string& message, AMFBaseValue& args, const SystemAddress& sysAddr) {
+	CBITSTREAM;
+	CMSGHEADER;
+
+	LWOOBJID empty = 0;
+	bitStream.Write(empty);
+	bitStream.Write(eGameMessageType::UI_MESSAGE_SERVER_TO_ALL_CLIENTS); // This is intentional to allow the server to send a ui message to a client via their system address.
+
+	bitStream.Write<AMFBaseValue&>(args);
+	uint32_t strMessageNameLength = message.size();
+	bitStream.Write(strMessageNameLength);
+
+	for (uint32_t k = 0; k < strMessageNameLength; k++) {
+		bitStream.Write<char>(message[k]);
+	}
+
+	SEND_PACKET;
+}
+
 void GameMessages::SendUIMessageServerToAllClients(const std::string& message, AMFBaseValue& args) {
 	CBITSTREAM;
 	CMSGHEADER;
diff --git a/dGame/dGameMessages/GameMessages.h b/dGame/dGameMessages/GameMessages.h
index 9c8d183e..68a8471a 100644
--- a/dGame/dGameMessages/GameMessages.h
+++ b/dGame/dGameMessages/GameMessages.h
@@ -92,6 +92,9 @@ namespace GameMessages {
 
 	void SendModifyLEGOScore(Entity* entity, const SystemAddress& sysAddr, int64_t score, eLootSourceType sourceType);
 	void SendUIMessageServerToSingleClient(Entity* entity, const SystemAddress& sysAddr, const std::string& message, AMFBaseValue& args);
+
+	// Specify sysAddr if you need to send a flash message to a client who you dont know the objectID of.
+	void SendUIMessageServerToSingleClient(const std::string& message, AMFBaseValue& args, const SystemAddress& sysAddr);
 	void SendUIMessageServerToAllClients(const std::string& message, AMFBaseValue& args);
 
 	void SendPlayEmbeddedEffectOnAllClientsNearObject(Entity* entity, std::u16string effectName, const LWOOBJID& fromObjectID, float radius);
diff --git a/dWorldServer/WorldServer.cpp b/dWorldServer/WorldServer.cpp
index ccc300bc..c9647bd5 100644
--- a/dWorldServer/WorldServer.cpp
+++ b/dWorldServer/WorldServer.cpp
@@ -79,6 +79,7 @@
 #include "Server.h"
 #include "PositionUpdate.h"
 #include "PlayerManager.h"
+#include "eLoginResponse.h"
 
 namespace Game {
 	Logger* logger = nullptr;
@@ -867,10 +868,28 @@ void HandlePacket(Packet* packet) {
 			}
 
 			// Developers may skip this check
-			if (accountInfo->maxGmLevel < eGameMasterLevel::DEVELOPER && clientDatabaseChecksum.string != databaseChecksum) {
-				LOG("Client's database checksum does not match the server's, aborting connection.");
-				Game::server->Disconnect(packet->systemAddress, eServerDisconnectIdentifiers::WRONG_GAME_VERSION);
-				return;
+			if (clientDatabaseChecksum.string != databaseChecksum) {
+
+				if (accountInfo->maxGmLevel < eGameMasterLevel::DEVELOPER) {
+					LOG("Client's database checksum does not match the server's, aborting connection.");
+					std::vector<Stamp> stamps;
+
+					// Using the LoginResponse here since the UI is still in the login screen state
+					// and we have a way to send a message about the client mismatch.
+					AuthPackets::SendLoginResponse(
+						Game::server, packet->systemAddress, eLoginResponse::PERMISSIONS_NOT_HIGH_ENOUGH,
+						Game::config->GetValue("cdclient_mismatch_message"), "", 0, "", stamps);
+					return;
+				} else {
+					AMFArrayValue args;
+
+					args.Insert("title", Game::config->GetValue("cdclient_mismatch_title"));
+					args.Insert("message", Game::config->GetValue("cdclient_mismatch_message"));
+
+					GameMessages::SendUIMessageServerToSingleClient("ToggleAnnounce", args, packet->systemAddress);
+					LOG("Account (%s) with GmLevel (%s) does not have a matching FDB, but is a developer and will skip this check."
+						, username.GetAsString().c_str(), StringifiedEnum::ToString(accountInfo->maxGmLevel).data());
+				}
 			}
 		}
 
diff --git a/resources/worldconfig.ini b/resources/worldconfig.ini
index c68b42d2..91028ffe 100644
--- a/resources/worldconfig.ini
+++ b/resources/worldconfig.ini
@@ -73,3 +73,7 @@ help_4_description=Visit Discussions on the DarkflameServer GitHub page<br/>to a
 
 # Toggleable quality of life feature to allow users to skip most cinematics. 
 allow_players_to_skip_cinematics=0
+
+# Customizable message for what to say when there is a cdclient fdb mismatch
+cdclient_mismatch_title=Version out of date
+cdclient_mismatch_message=We detected that your client is out of date. Please update your client to the latest version.