diff --git a/packages/server/index.ts b/packages/server/index.ts
index acbf484..5955eb1 100644
--- a/packages/server/index.ts
+++ b/packages/server/index.ts
@@ -39,7 +39,7 @@ const clients = new Map();
 
 console.log(`Starting WebSocket server ...`);
 
-console.log("Server configuration:", config);
+console.log('Server configuration:', config);
 
 wss.on('connection', (ws) => {
 
@@ -105,17 +105,29 @@ wss.on('connection', (ws) => {
                 // check if recipient exists and is connected
                 if (recipientWs && recipientWs.readyState === WebSocket.OPEN) {
 
+                    const timestamp = new Date().toISOString();
+
                     // The recipient is connected. Forward the message.
                     const forwardMessage = {
                         type: MessageType.receive_hl7v2,
                         payload: {
                             message: message,
-                            timestamp: new Date().toISOString(),
+                            timestamp: timestamp,
                         },
                     } as Message;
                     recipientWs.send(JSON.stringify(forwardMessage));
                     console.log(`Forwarded message to ${recipientId}`);
 
+                    const ackMessage = {
+                        type: MessageType.delivery_success,
+                        payload: {
+                            message: message,
+                            timestamp: timestamp,
+                        },
+                    };
+                    ws.send(JSON.stringify(ackMessage));
+                    console.log(`Sent acknowledgment to ${stationId}`);
+
                 } else {
 
                     // The recipient is not connected or not found.