public function submit( $posted_data, $location, $args = array() ) {

		// Determine the user action to perform.
		$action = get_current_user_id() ? 'update' : 'registration';

		// Load the form, filtering out invisible fields, only for checkout form.
		if ( 'checkout' === $location ) {
			add_filter( 'llms_forms_remove_invisible_field', '__return_true', 999 );
		}
		$fields = $this->get_fields( $action, $location, $args );
		if ( 'checkout' === $location ) {
			remove_filter( 'llms_forms_remove_invisible_field', '__return_true', 999 );
		}

		if ( is_wp_error( $fields ) ) {
			return $this->submit_error( $fields, $posted_data, $action );
		}

		// Make sure the user id cannot be forced by user submission.
		unset( $posted_data['user_id'] );

		if ( ! empty( $args['validate_only'] ) ) {
			return $this->validate_fields( $posted_data, $location, $fields, $action );
		}

		return $this->submit_fields( $posted_data, $location, $fields, $action );

	}