diff --git a/lib/transport.js b/lib/transport.js
index 642e892..6e3eba9 100644
--- a/lib/transport.js
+++ b/lib/transport.js
@@ -66,6 +66,10 @@ bot.on('text', async (ctx) => {
 async function send(partner, msg) {
     const me =  bot.context.botInfo.username;
 
+    if (!partner || !msg) {
+        return;
+    }
+
     const chatId = await addressbook.get(partner);
     if (!chatId) {
         logger.info('Not sending message because partner does not exist on address book', {transport: 'telegram', me: me, partner: partner, msg: msg });