---
title: Resolving Message Sending Failures
description: "If your messages are marked as \"Failed\" or are stuck in \"Pending,\" check these two common issues immediately: 1. **Missing Country Code (Most Common):** - SyncMate requires phone numbers with the country code included (e.g., `15551234567` for US, `919876543210` for…"
url: "https://www.assistro.co/user-guide/other/resolving-message-sending-failures/"
updated: "2026-02-17"
category: Other
---

# Resolving Message Sending Failures

If your messages are marked as "Failed" or are stuck in "Pending," check these two common issues immediately:

1. **Missing Country Code (Most Common):**

   - SyncMate requires phone numbers with the country code included (e.g., `15551234567` for US, `919876543210` for India).
   - **Do not** use `0` at the start.
   - *Fix:* Check your contact list or API payload and ensure the country code is attached to the number.
2. **WhatsApp Disconnected:**

   - Since SyncMate works by linking to your WhatsApp, your WhatsApp **must have an active connection with SyncMate** for messages to go out.
3. **Session Expired:**

   - Sometimes the linked session expires for security reasons. Go to the your Assistro account > Configuration > scan the QR code again to refresh your WhatsApp connection.