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How do I activate phone verification over SMS or WhatsApp in my forms?

With the new phone verification feature, you can verify leads’ phone numbers directly within your form simple, fast, and secure.

Cagla avatar
Written by Cagla
Updated over a month ago

📌 Benefits of Phone Verification via SMS/WhatsApp

  1. Higher Lead Quality
    Only real phone numbers are accepted — this protects you from spam and ensures you receive reliable contact information.
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  2. Build Trust with Visitors
    Verification shows that you work professionally and care about security. This increases trust in your business.
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  3. Automated Verification
    The code is automatically sent via SMS or WhatsApp. The user simply enters the code — fast, easy, and secure.

Requirements

This feature is only available in the Forms & Funnels: Expand plan.
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The first 50 verifications per month are free. The counter resets every month (based on your billing cycle). After that, the following rates apply:

Number of SMS

Price per SMS

1–50

€0.00

51–100

€0.18

101–500

€0.15

501–2,000

€0.13

2,001+

€0.12


How to enable phone verification:

Step 1: Add a phone field to your form.


Click the gear icon (⚙️) on the phone field and activate the option "Phone Verification."

Step 2: Choose the verification method:

  1. Auto (system automatically chooses SMS or WhatsApp)

  2. SMS only

  3. WhatsApp only

Step 3: Select verification position:

  1. Inline (the code is requested directly within the form field)

  2. On Submit (verification takes place after form submission)

Step 4: Edit the content by clicking the pencil icon

Collect unverified leads

With the “Collect unverified leads” option enabled, form entries will also be saved even if the phone number hasn't been verified via SMS or WhatsApp. This way, you won’t lose potential contacts, even if the number is not confirmed.

This can be useful if you want to collect as many leads as possible, even though some numbers may be incorrect or invalid.


What does the visitor experience?

  1. The visitor enters their phone number.

  2. They receive a code via SMS or WhatsApp.

  3. They enter the code in the form.

⚠️ Important: The verification code is valid for 5 minutes.

Once the number is verified, a green confirmation checkmark appears next to the phone number field in the form.


Verification in the CRM

In the CRM, the phone verification status is visible:

  • Phone number verified

Frequently asked questions and solutions

Is the text in the verification SMS editable?

The text in the SMS/WhatsApp message is not editable. There is no white-labeling option available for this.

Will the verification status also be available via the API?

The phone verification status is currently only displayed within our CRM.

Can I use a landline number for phone verification via SMS or WhatsApp?

No, landline numbers are not supported for SMS or WhatsApp verification, as they cannot receive mobile messages. To enable phone verification in forms, please use a mobile number that can receive SMS or has WhatsApp installed.

If you're working with contacts who only have a landline, consider offering email verification as an alternative.

Is SMS/WhatsApp verification GDPR-compliant?

Yes, phone verification through Onepage complies with GDPR. However, it’s your responsibility to ensure that you inform users about data processing in your privacy policy.

What does phone verification via SMS or WhatsApp cost?

Phone verification is included in the Expand Addon on a usage-based pricing model:

  • 50 free verifications per month

  • Additional verifications cost between €0.12 and €0.18 per SMS, depending on volume (bulk discounts available)

  • The counter resets monthly based on your billing cycle

You can start risk-free with 50 free verifications and test the feature directly!

Can I use phone verification without the Expand Addon and buy just this function?

No, the phone verification feature is only available in combination with the Expand Addon. If you'd like to use SMS or WhatsApp verification in your forms, please upgrade to the Expand Addon in your plan settings.

I have the Expand Addon – why don’t I see the phone verification option in my form?

In this case, you’re most likely still using the old form element in your project. SMS and WhatsApp verification is only available in the new form element.

Solution: Replace the old form in your project with the new form element.

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How do I integrate Calendly into my form?

💡Do you have any feedback concerning this article? Please let us know through our live chat or at support@onepage.io, so we may keep it up to date. Thank you! 🙂

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