This article explains how to fix common form validation problems on your WordPress website.
Check Your Required Fields Settings
Form validation errors often happen when required fields aren't set up correctly. Go to your WordPress admin dashboard and find the form that's causing problems.
Look for any fields marked as "required" or "mandatory". Make sure these fields have a red asterisk (*) or clear text telling visitors they must fill them in. If visitors can't see which fields are required, they'll get confusing error messages when they try to submit.
Check that email fields are actually set to validate email addresses. Many forms break because someone enters "john@email" instead of "john@email.com" but the validation isn't working properly.
Test Your Form Validation Messages
Validation messages tell visitors what went wrong when they fill in your form incorrectly. These messages should be clear and helpful.
Try submitting your form with missing information or incorrect data (like "abc" in an email field). You should see specific error messages like "Please enter your email address" or "Email address must be valid".
If you see generic messages like "Error" or nothing at all, your validation isn't working. Look for a "Validation" or "Error Messages" section in your form settings where you can write custom messages.
Clear Form and Browser Cache
Cached files can cause old form code to load, making validation appear broken. Clear your website cache first through your WordPress admin area or any caching plugins you have installed.
Then clear your browser cache by pressing Ctrl+F5 (or Cmd+Shift+R on Mac) while viewing your form page. Test the form again with both correct and incorrect information.
Check for JavaScript Conflicts
Form validation usually needs JavaScript to work properly. Other plugins or themes can sometimes interfere with this code.
Right-click on your form page and select "Inspect" or "Inspect Element". Click the "Console" tab and look for any red error messages. These errors can break form validation.
If you see JavaScript errors, try temporarily disabling other plugins one by one to find which one is causing the conflict. You can also check if your form has plugin conflicts.
Verify Form Plugin Settings
If you're using a contact form plugin like Contact Form 7 or Gravity Forms, check the plugin's validation settings. Look for options like:
- Enable client-side validation
- Show validation errors
- Required field validation
- Email format validation
Make sure these options are turned on. Some plugins have validation disabled by default.
Also check that your form shortcode is correct if you're using one. A wrong shortcode can make validation fail silently.
Test Different Browsers and Devices
Some validation problems only happen on certain browsers or mobile devices. Test your form on:
- Chrome, Firefox, Safari, and Edge browsers
- Mobile phones and tablets
- Different screen sizes
If validation works on desktop but not mobile, you might have responsive design issues affecting your forms.
If you're still stuck, contact Web60 support with details about which form is having problems and what error messages (if any) you're seeing.
FAQ
Q: Why do visitors get error messages even when they fill in all fields?
A: This usually happens when required field settings are wrong or when there are hidden required fields on your form. Check that all required fields are clearly marked and visible to visitors.
Q: My contact form validation worked before but stopped working recently
A: This often happens after WordPress, theme, or plugin updates. Check for JavaScript conflicts and clear your cache first, then test if any recent updates caused the problem.
Q: Can I customize the validation error messages on my forms?
A: Yes, most form plugins let you write custom validation messages. Look for "Validation" or "Error Messages" settings in your form configuration.
Q: Why doesn't email validation work on my contact form?
A: Make sure your email field is actually set to "email" type, not just "text". The field needs to be configured specifically for email addresses to validate properly.
Q: Form validation works on my computer but not on mobile phones
A: This is usually a responsive design issue where validation messages are hidden or form fields aren't displaying correctly on smaller screens.
Q: Should I use client-side or server-side form validation?
A: Use both for best results. Client-side validation (JavaScript) gives instant feedback to visitors, while server-side validation protects against spam and ensures data is properly checked.
Last updated: 1 March 2026