One of the most important steps in preventing duplicate submissions is choosing the right fields to validate.

The Choose the unique fields in WordPress forms feature allows you to select exactly which form fields should be checked for duplicates before a submission is saved.

Instead of blocking entire forms, you control which specific values must remain unique.

What Does “Choose the Unique Fields” Mean?

When you use Choose the unique fields in WordPress forms, you decide which input fields should not allow duplicate values.

This means:

• If a selected field value already exists, the submission is blocked.
• If the value is new, the submission is allowed.
• You can select one or multiple fields.

This gives you full flexibility and precision.

Available Field Types You Can Make Unique

You can apply duplicate validation to different types of fields, including:

• Name (text)
• Email (email)
• Message (textarea)
• URL (url)
• TEL (tel)
• Second Text (text)

The user selects the field or fields that should not accept duplicate entries.

Example: Name + Email Selected

If you select both Name and Email, the rule becomes:

• Name must not exist already
  AND
• Email must not exist already

So:

• Same email, different name → blocked (because Email already exists)
• Same name, different email → blocked (because Name already exists)
• Both new → allowed

How Duplicate Validation Works

Once you choose the unique fields in WordPress forms, the system checks the database before saving a new submission.

If a duplicate is detected:

• The submission is stopped.
• A validation error message appears.
• The entry is not stored.

If no duplicate is found:

• The submission proceeds normally.

This happens instantly during form validation.

Choosing One Field vs Multiple Fields

You can select:

Single Field Validation

Example:

• Email must be unique.

If the email already exists, the submission is blocked.

Multiple Field Combination Validation

Example:

• Name + Email must match exactly to be considered duplicate.

This means:

• Same email but different name → allowed.
• Same name and same email → blocked.

This gives you more advanced duplicate control.

Best Practices: What Should You Choose?

Here are recommended strategies:

✔ Use Email for contact forms
✔ Use Email or Username for registration forms
✔ Use TEL for lead generation forms
✔ Use combinations for advanced filtering
✔ Avoid making large textarea fields unique unless necessary

Choosing the correct unique fields ensures:

• Clean data
• Accurate reporting
• Better CRM integration
• Fewer duplicate leads

When Should You Avoid Making a Field Unique?

Do not make a field unique if:

• The field naturally repeats (e.g., common names)
• You expect multiple legitimate submissions
• The field does not identify the user

The goal is smart validation, not over-restriction.

Why Choosing the Right Unique Fields Matters

If you select the wrong fields:

• You may block legitimate submissions.
• You may allow unwanted duplicates.
• You may distort reporting.

That’s why the Choose the unique fields in WordPress forms feature gives you precise control.

You decide what matters.