SMS Sender ID
Use an SMS Sender ID when you want customers to recognize the business sending the message.
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Explain how SMS Sender IDs work with the SMSLeopard SMS API
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Why Sender IDs Matter
A Sender ID replaces a plain phone number with a recognizable business name where supported by the destination network. This improves trust for OTPs, payment reminders, service alerts, and campaigns.
| Messaging type | Why a Sender ID helps |
|---|---|
| OTPs and verification | Customers can identify the source of the code |
| Payment reminders | The message feels official and easier to trust |
| Service updates | Customers know which business is communicating |
| Campaigns | Brand recall improves when the sender is consistent |
How To Use A Sender ID In The API
Pass your approved sender name in the source parameter when sending SMS.
curl -u "$API_KEY:$API_SECRET" \
"https://api.smsleopard.com/v1/sms/send?message=Your%20order%20has%20been%20confirmed&destination=254700000001&source=YOUR_SENDER_ID"Approval And Availability
Sender ID rules vary by country and mobile network. Some routes support alphanumeric sender IDs, some require pre-registration, and some may use a default sender depending on the destination.
Confirm sender ID availability and approval requirements before launching high-volume or business-critical traffic.
Troubleshooting
If the API returns an invalid sender ID error:
- Confirm that the sender ID has been approved for your account.
- Confirm that the sender ID is valid for the destination country or network.
- Check for spelling, spaces, or unsupported characters.
- Use a test sender only for testing, not for live customer communication.