In online stores, collecting accurate and complete customer information is essential for smooth order fulfillment and reliable communication. One of the most commonly overlooked details during checkout is the phone number. When this information is missing, it can lead to delivery delays, failed contact attempts, and unnecessary support tickets. The Phone Number Missing rule ensures that customers cannot proceed with checkout unless a phone number is provided.
By enforcing this rule, businesses can improve data quality and avoid preventable operational issues.
Why Phone Numbers Matter
Missing phone numbers can create multiple challenges for businesses, including:
Delivery complications: Couriers often require a phone number to confirm addresses or resolve last-mile delivery issues.
Increased risk of incomplete or fraudulent orders: Orders without contact information are more likely to be invalid or suspicious.
Requiring a phone number helps ensure every order is actionable and legitimate.
How Phone Number Missing Check Works
The Phone Number Missing rule automatically validates the phone number field during checkout. If the field is empty, the system immediately triggers an error message and prevents the customer from proceeding.
This validation ensures incomplete customer details are caught early, before an order is placed, without disrupting the overall checkout experience.

Key Features
Universal Rule Execution
Once enabled, the Phone Number Missing rule runs automatically during checkout. It continuously checks whether the phone number field is empty and applies to all customers without the need for additional conditions.
Inline Error Messaging
If a phone number is missing, an error message can be displayed either at the top of the Checkout page or directly below the phone number input field. This immediate feedback helps customers quickly understand what information is required.
Customizable Error Messaging
Businesses can customize the error message to match their brand voice and tone. For example:
“Phone number is required.”
This keeps the message clear, helpful, and professional.

Conclusion
The Phone Number Missing check is a simple but powerful validation rule that helps ensure every order includes essential contact information. By requiring a phone number at checkout, businesses can reduce delivery issues, improve customer communication, and maintain clean, reliable order data.
If you have any questions or need further assistance, feel free to reach out to support@valider.app
Was this article helpful?
That’s Great!
Thank you for your feedback
Sorry! We couldn't be helpful
Thank you for your feedback
Feedback sent
We appreciate your effort and will try to fix the article