Why Isn't My WhatsApp Message Sending?
If your WhatsApp Business API message was not sent or failed to deliver, there are several possible reasons. Most delivery issues are caused by recipient settings, WhatsApp account status, messaging restrictions, or Meta policies.
This guide explains the most common causes of WhatsApp message delivery failures and how to resolve them.
Common Reasons Why a WhatsApp Message Wasn't Sent
1. The recipient is not using WhatsApp
If the phone number is not registered with WhatsApp, messages cannot be delivered.
How to fix it
Verify that the recipient's phone number is registered with WhatsApp.
Confirm the number is entered in the correct international format (including the country code).
2. The recipient needs to update or reactivate WhatsApp
Messages may fail if the recipient is using an outdated version of WhatsApp or has not accepted the latest WhatsApp Terms of Service or Privacy Policy.
How to fix it
Ask the recipient to:
Update WhatsApp to the latest version.
Open the app and accept any pending Terms of Service or Privacy Policy updates.
3. The recipient has blocked your business
If your WhatsApp Business number has been blocked by the recipient, message delivery is not possible.
How to fix it
Ask the recipient to check whether your business has been blocked and, if necessary, unblock your number.
4. The recipient has been inactive for a long time
If a WhatsApp account has been inactive for an extended period, messages may not be delivered until the user becomes active again.
How to fix it
Ask the recipient to:
Open WhatsApp.
Connect to the internet.
Use the app before you try sending another message.
5. Messaging limits or messaging quality restrictions
Meta may temporarily restrict message delivery if your business reaches messaging limits or if your messaging quality rating declines. This most commonly affects marketing campaigns.
How to fix it
Review your messaging quality in WhatsApp Manager.
Check your WhatsApp Business Account status.
Follow Meta's messaging policies and best practices.
Avoid sending unwanted or excessive marketing messages.
6. Country or regional restrictions
WhatsApp Business messaging is not supported in every country or region. Local regulations may also prevent message delivery.
How to fix it
Confirm that WhatsApp Business messaging is available in the recipient's country or region.
7. The 24-hour customer service window has expired
Free-form messages can only be sent within the 24-hour customer service window after the customer last contacted your business.
Outside this window, you must use an approved WhatsApp message template.
How to fix it
Send an approved WhatsApp template message to start a new conversation.
Alternatively, ask the customer to send your business a new WhatsApp message to reopen the 24-hour messaging window.
Still Can't Send WhatsApp Messages?
If your WhatsApp messages are still failing to send, perform the following checks:
Verify the phone number uses the correct international format.
Review the message status and any error codes in Saysimple.
Check your WhatsApp Business Account status in Meta Business Manager.
Confirm that your message template has been approved (if applicable).
Ensure your business is not affected by messaging quality restrictions.
If the issue persists, contact Saysimple Support and include:
The recipient's phone number
The date and time the message was sent
The message ID (if available)
Any WhatsApp or Meta error code displayed
Providing this information helps our support team investigate and resolve the issue more quickly.
Frequently Asked Questions
Why is my WhatsApp Business API message not sending?
The most common reasons are:
The recipient is not registered on WhatsApp.
The recipient has blocked your business.
The 24-hour customer service window has expired.
Your business has messaging quality restrictions.
The recipient's WhatsApp account is inactive.
Can I send a WhatsApp message after the 24-hour window?
Yes. You must use an approved WhatsApp template message to start a new conversation.
Where can I find the WhatsApp error code?
You can find message statuses and error codes directly in Saysimple. These codes help identify whether the issue is related to the recipient, your WhatsApp Business Account, or Meta's messaging platform.