> ## Knowledge Base Index
> Fetch the complete knowledge base index at: https://help.poptin.com/sitemap.xml
> Use this file to discover available pages before exploring further.
> Pure-Markdown content can be obtained by appending a '.md' suffix to the content URLs listed in the sitemap (without the trailing slash).

# What is "Validation" of input fields?

When you add fields to your popup, you can choose if you want to activate the **Validation** or not.

**Email Validation**

Poptin's Email Validation provides multiple validation options. 

![](https://storage.crisp.chat/users/helpdesk/website/7a34af3b43dae400/screenshot-2024-08-06-at-12413_1fxopf5.png)

1. Check Email Format and Prevent Typos

Validation checks for email in the right format according to the browser check that will include the "@" sign and makes sure there are no typos.

Example - example@hokmail.com or samantha@gnail.com

2. Accept Only Business Emails

Validation checks for free email providers and prevent users from submitting that email. 

Example - Email addresses ending with gmail.com, hotmail.com and yahoo.com won't be accepted.

3. Format & Typos, Business Emails

Validation makes sure that the email address are free of any typos, checks email format and allows only business emails.

**"Phone Validation"**

Poptin's phone validation provides multiple validation options. 

![](https://storage.crisp.chat/users/helpdesk/website/7a34af3b43dae400/screenshot-2024-08-06-at-14552_6s8v7z.png)

1. With Validation

If you turned on validation for Phone field, the visitors will be able  to enter 7-15 digits and no letters or special characters except - ( ) and +. 

2. International number with Prefix

Automatically selects the prefix for visitors based on the IP address. 

Example - +1 999 123 1294 for US or +44 20 7123 4567 for the UK.

3. No Validation

Doesn't validate and allows for numbers to be added.

The browser and Poptin check for the @ sign and makes sure there are no special characters in the email address. For more information on how this works please check the article mentioned below.

https://newbedev.com/what-is-the-actual-minimum-length-of-an-email-address-as-defined-by-the-ietf

**Note**: Error validation messages will be displayed in the user's browser language. Poptin has no control over the language of the validation messages.