> For the complete documentation index, see [llms.txt](https://docs.powerfulform.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.powerfulform.com/data-insights-and-management/limit-to-one-submit-per-user.md).

# Limit to one submit per user

You can restrict users to a single submission based on their email address or phone number.

### ⚙️ Step to enable

1\. Open the app > click **Forms** > open a form

2\. Click setting icon on the left side > click **General**

3\. Tick on checkbox **Limit to one submit per user** > select option to identify the customers: **email** or **phone**

4\. Click **Save**

<figure><img src="/files/6dts1J9xBPg1xBfQMyoF" alt=""><figcaption></figcaption></figure>

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### ✅ How It Works

Once **Limit to one submit per user** is enabled, the app checks for duplicate entries based on the **email address** or **phone number** entered in the form.

**🚫 When a user tries to submit again**

If someone attempts to submit the form more than once using the same email or phone number, the form will block the submission and show an error message such as:

> **“Data already exists”**

This message informs the user that they have already submitted the form.

<figure><img src="/files/87zYDxtZ8QugvjG4Lz9M" alt=""><figcaption></figcaption></figure>

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### 🔧 Use Cases&#x20;

When we should enable this option?

* Contests or giveaways:  limit to one entry per user
* Exclusive offers or coupons: avoid duplicate uses
* Customer feedback or surveys: ensure one response per customer
* Membership applications: one submission per applicant

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#### Need More Help?

If you still need assistance, please contact us at <contact@globo.io>. Our team will be happy to help you resolve any issues or guide you further[<br>](https://da76v9kevdkud.cloudfront.net/wp-content/uploads/2024/09/2024-09-13_17-10-22.png)