How do I validate a field? I checked the 'Required' checkbox, but I was able to send a form without that field being completed.

The 'Required' checkbox adds the asterisk ( * ) to the form so there is a visual cue that the field is required. However, in order to actually force validation of an element, you must invoke a validation script / rule. You do that in the 'Validation' section of a form element: 

Under most circumstances, you will want to choose a validation rule from the library. To do so, click on the 'Library' radio button next to Validation (as shown above). Next, enter an error message in the ERROR MESSAGE field. This is the error that will appear to a user if the field does not validate. Finally, click on the dropdown arrow to choose a script to invoke a validation rule. The scripts / validation rules that are installed with BreezingForms include:

The script to use will depend on the element type. Scripts and validation rules are listed below in alphabetical order.

FF::ff_anychecked

Validates that a radio button in selected in a radio group, or that a checkbox has been checked in a checkbox group.
Can be used with the following elements:

• Radio Group
• Checkbox Group

FF::ff_checked

Validates that a radio button or checkbox is checked.
Can be used with the following elements:

• Radio Button (when only one in use)
• Checkbox (when only one in use)

FF::ff_flashupload_not_empty

Validates that a file is uploaded using the Flash option in the File Upload element.
Can be used with the following elements:

• File Upload - with 'Use Flash Upload' checkbox checked in Advanced Properties

FF::ff_integer

Validates that an integer value is entered.
Can be used with the following elements:

• Textfield
• Hidden Input

FF::ff_integer_or_empty

Validates that either an integer value or nothing is entered.
Can be used with the following elements:

• Textfield
• Hidden Input

FF::ff_integeramount

Validates that a positive integer value is entered.
Can be used with the following elements:

• Textfield
• Hidden Input

FF::ff_real

Validates that a real number is entered.
Can be used with the following elements:

• Textfield
• Hidden Input

FF::ff_realamount

Validates that a positive real number is entered.
Can be used with the following elements:

• Textfield
• Hidden Input

FF::ff_securitycode_entered

Checks that a security code was entered.

Not used in QuickMode.

FF::ff_securitycode_ok

Checks that a valid security code was entered.

Not used in QuickMode.

FF::ff_showvalidation

Displays element validation - Used for debugging.
Can be used with the following elements:

• ALL, except Submit Button; Summarize; Captcha; ReCaptcha; PayPal Button;

DirectPayment Button

FF::ff_unchecked

Validates that a radio button or checkbox is unchecked.
Can be used with the following elements:

• Radio Button (when only one in use)
• Checkbox (when only one in use)

FF::ff_validemail

Validates that the syntax for an email address is correct (not the email address itself).
Can be used with the following elements:

• Any Textfield that is used to capture an Email address

FF::ff_validemail_repeat

Checks that the field value is a valid email address (syntax only) and has a second counterpart with an equal value.
Can be used with the following elements:

• Any Textfield that is used to capture an Email address

For more information on how this option works, please see this KnowledgeBase article.

FF::ff_valuenotempty

Validates that the field value is not empty.
Can be used with the following elements:

• Textfield
• Textarea
• Select-List
• Hidden Input
• Calendar
• Regular Upload Element (Non-Flash)