> For the complete documentation index, see [llms.txt](https://docs.cymbal.co/help/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.cymbal.co/help/sms/sms-best-practices/why-include-your-sender-id.md).

# Why Include your Sender ID

This page describes why including your sender ID is key for SMS blasts

Including a Sender ID at the beginning of your SMS messages is one of the most effective ways to make your campaigns recognizable, trustworthy, and compliant. A Sender ID — like “Odd One Out:” at the beginning of your messages — clearly shows recipients who the message is from before they even open it.

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### Why It Matters

#### 1. **Builds Immediate Trust**

Customers are far more likely to open and read a message when they instantly recognize the sender. Without a clear Sender ID, your SMS can look suspicious or be mistaken for spam.

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#### 2. **Improves Delivery and Engagement Rates**

Carriers and spam filters prioritize messages from known, trusted sources. Messages without a Sender ID are more likely to be blocked or marked as spam. Including “Odd One Out:” at the beginning of your messages helps ensure your campaign reaches customers and improves your click-through rates.

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#### 3. **Ensures Compliance and Transparency**

Many countries require businesses to clearly identify themselves in SMS communications. Failing to include your Sender ID can lead to **non-compliance**, **message rejections**, or **fines**. 

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### Consequences of Not Including a Sender ID

* 🚫 **Higher spam risk:** Unidentified messages may be filtered or blocked.
* ⚠️ **Erodes trust:** Recipients can’t be sure who’s messaging them and may opt out or report it.
* 💸 **Lower ROI:** Unread or undelivered messages waste your marketing budget.
* ⚖️ **Regulatory penalties:** Some regions enforce strict sender identification requirements.

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### Best Practices for Using Sender IDs

1. **Always start your message with your brand name**
   * Format: “Odd One Out: \[Your message here]”
   * Keep it clear and consistent.
2. **Use an authentic and recognizable Sender ID**
   * Stick to your brand name.
3. **Stay consistent across campaigns**
   * Every SMS from your brand should begin with “Odd One Out:” — this builds familiarity and trust over time.
4. **Test before sending**
   * Send a test to verify your Sender ID appears correctly across carriers and devices.