Hide a form field

Hide a field

Turn on Hidden Field when a supported field should remain in the form without being visible to participants.

1. Open the promotion builder and select Form.
2. Open the field you want to hide.
3. Select Advanced.
4. Turn on Hidden Field.
5. Preview and test the published promotion.

The builder marks the field with a hidden-field icon. Participants do not see the field in the published form, but the field remains part of the form and its submitted data.

Populate a hidden field

A hidden field is useful when your site supplies a value rather than asking the participant to enter it. For an embedded promotion, you can use the field's Field ID and a URL parameter to pre-fill a supported hidden field.

Do not put personal or sensitive information in URL parameters. URLs can appear in browser history, analytics, logs, and referral data.

Important limitations

Hiding a field is a display choice, not a security control. A participant with browser development tools may be able to inspect or change its value. Do not use a hidden field by itself to prove eligibility, grant access, set a prize outcome, record consent, or store a secret.

Always validate important values through the appropriate Revup setting or through your own trusted system. Test that the field receives the expected value and appears correctly in participant data and exports before publishing.