# The element “header” must not appear as a descendant of the “footer” element. > Canonical HTML version: https://rocketvalidator.com/html-validation/the-element-header-must-not-appear-as-a-descendant-of-the-footer-element > Attribution: Rocket Validator (https://rocketvalidator.com) > License: CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/) The `