> For the complete documentation index, see [llms.txt](https://guide.form.gov.sg/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://guide.form.gov.sg/user-guides/advanced-guide/verified-smses.md).

# Verified SMSes

{% hint style="info" %}
Starting **1 July 2025**, each FormSG form with mobile number OTP verification will be allocated **10,000 free SMS OTP** verifications. Once this limit is reached, the form will be automatically closed to new responses.

* For existing forms with mobile OTP verification enabled, the **SMS count will reset to zero on 1 July 2025**
* **Monitor your forms SMS usage** directly on FormSG by following the [steps below](#to-monitor-your-forms-sms-otp-usage)
  {% endhint %}

The Verified SMS feature on the **Mobile number** field triggers an SMS containing a One-Time Password (OTP) to the entered mobile number, where respondents have to verify before they are able to submit a response. 

{% tabs %}
{% tab title="Text Tutorial" %}

## To enable mobile number OTP verification

**Step 1: Add a mobile number field**

<figure><img src="/files/b79nfpm8nW2bK2eIaDL4" alt=""><figcaption></figcaption></figure>

**Step 2: Enable OTP verification**

<figure><img src="/files/ewLEPDnwTWI56t5z7jJj" alt=""><figcaption></figcaption></figure>

**Step 3: Acknowledge the 10,000 free SMS OTP limit for the form**

<figure><img src="/files/EJBF5j5JDKGJAOtTTXT0" alt=""><figcaption></figcaption></figure>

## To monitor your form’s SMS OTP usage

**Step 1: Click on your Mobile number field**&#x20;

<figure><img src="/files/TWeZE4vZs9GBRZH9ld8T" alt=""><figcaption></figcaption></figure>

**Step 2: Refer to the SMSes used under "OTP verification"**

<figure><img src="/files/I4gvMiiVzMGJN17CiDe8" alt=""><figcaption></figcaption></figure>
{% endtab %}
{% endtabs %}


---

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