diff --git a/CRM/Case/Form/Task.php b/CRM/Case/Form/Task.php
index d1f318ac4322..0734653c2f3b 100644
--- a/CRM/Case/Form/Task.php
+++ b/CRM/Case/Form/Task.php
@@ -68,6 +68,23 @@ public function orderBy() {
     return 'ORDER BY ' . implode(',', $order_array);
   }
 
+  /**
+   * Get the rows from the results to be pdf-d.
+   *
+   * @return array
+   */
+  protected function getRows(): array {
+    $rows = [];
+    foreach ($this->_contactIds as $index => $contactID) {
+      $caseID = $this->getVar('_caseId');
+      if (empty($caseID) && !empty($this->_caseIds[$index])) {
+        $caseID = $this->_caseIds[$index];
+      }
+      $rows[] = ['contactId' => $contactID, 'caseId' => $caseID];
+    }
+    return $rows;
+  }
+
   /**
    * Get the name of the table for the relevant entity.
    *
diff --git a/CRM/Contact/Form/Task.php b/CRM/Contact/Form/Task.php
index 67b7f2be125f..2a2ad62c635d 100644
--- a/CRM/Contact/Form/Task.php
+++ b/CRM/Contact/Form/Task.php
@@ -137,7 +137,7 @@ public static function preProcessCommon(&$form) {
       // since we don't store all contacts in prevnextcache, when user selects "all" use query to retrieve contacts
       // rather than prevnext cache table for most of the task actions except export where we rebuild query to fetch
       // final result set
-      $allCids[$cacheKey] = self::getContactIds($form);
+      $allCids[$cacheKey] = self::legacyGetContactIds($form);
 
       $form->_contactIds = [];
       if (empty($form->_contactIds)) {
@@ -222,11 +222,16 @@ public static function preProcessCommon(&$form) {
    *   - custom search (FIXME: does this still apply to custom search?).
    * When we call this function we are not using the prev/next cache
    *
+   * We've started to try to move away from these functions
+   * being static. Probably we need to convert the export forms
+   * to use a trait based approach. For now this is renamed to
+   * permit the use of a non-static function with this name
+   *
    * @param $form CRM_Core_Form
    *
    * @return array $contactIds
    */
-  public static function getContactIds($form) {
+  protected static function legacyGetContactIds($form) {
     // need to perform action on all contacts
     // fire the query again and get the contact id's + display name
     $sortID = NULL;
diff --git a/CRM/Contact/Form/Task/PDF.php b/CRM/Contact/Form/Task/PDF.php
index 9688e912e3e6..66f1138eb594 100644
--- a/CRM/Contact/Form/Task/PDF.php
+++ b/CRM/Contact/Form/Task/PDF.php
@@ -110,4 +110,26 @@ public function listTokens() {
     return $tokens;
   }
 
+  /**
+   * Get the rows from the results to be pdf-d.
+   *
+   * @todo the case handling should be in the case pdf task.
+   * It needs fixing to support standalone & some url fixes
+   *
+   * similar to https://github.com/civicrm/civicrm-core/pull/21688
+   *
+   * @return array
+   */
+  protected function getRows(): array {
+    $rows = [];
+    foreach ($this->_contactIds as $index => $contactID) {
+      $caseID = $this->getVar('_caseId');
+      if (empty($caseID) && !empty($this->_caseIds[$index])) {
+        $caseID = $this->_caseIds[$index];
+      }
+      $rows[] = ['contactId' => $contactID, 'caseId' => $caseID];
+    }
+    return $rows;
+  }
+
 }
diff --git a/CRM/Contact/Form/Task/PDFTrait.php b/CRM/Contact/Form/Task/PDFTrait.php
index e0877493ce37..2cfa43c87bb8 100644
--- a/CRM/Contact/Form/Task/PDFTrait.php
+++ b/CRM/Contact/Form/Task/PDFTrait.php
@@ -237,16 +237,11 @@ public function postProcess(): void {
       [$html_message, $zip] = CRM_Utils_PDF_Document::unzipDoc($formValues['document_file_path'], $formValues['document_type']);
     }
 
-    foreach ($this->_contactIds as $item => $contactId) {
-      $caseId = $this->getVar('_caseId');
-      if (empty($caseId) && !empty($this->_caseIds[$item])) {
-        $caseId = $this->_caseIds[$item];
-      }
-
+    foreach ($this->getRows() as $row) {
       $tokenHtml = CRM_Core_BAO_MessageTemplate::renderTemplate([
-        'contactId' => $contactId,
+        'contactId' => $row['contactId'],
         'messageTemplate' => ['msg_html' => $html_message],
-        'tokenContext' => $caseId ? ['caseId' => $caseId] : [],
+        'tokenContext' => array_merge($row, ['schema' => $this->getTokenSchema()]),
         'disableSmarty' => (!defined('CIVICRM_MAIL_SMARTY') || !CIVICRM_MAIL_SMARTY),
       ])['html'];
 
diff --git a/CRM/Core/Form/Task.php b/CRM/Core/Form/Task.php
index 93051b63d6e1..81ed62d15caf 100644
--- a/CRM/Core/Form/Task.php
+++ b/CRM/Core/Form/Task.php
@@ -359,4 +359,26 @@ protected function getTokenSchema(): array {
     return ['contactId'];
   }
 
+  /**
+   * Get the rows from the results.
+   *
+   * @return array
+   */
+  protected function getRows(): array {
+    $rows = [];
+    foreach ($this->getContactIDs() as $contactID) {
+      $rows[] = ['contactId' => $contactID];
+    }
+    return $rows;
+  }
+
+  /**
+   * Get the relevant contact IDs.
+   *
+   * @return array
+   */
+  protected function getContactIDs(): array {
+    return $this->_contactIds ?? [];
+  }
+
 }
diff --git a/CRM/Event/Form/Task.php b/CRM/Event/Form/Task.php
index e3bbae330dac..20704e0e9392 100644
--- a/CRM/Event/Form/Task.php
+++ b/CRM/Event/Form/Task.php
@@ -15,6 +15,8 @@
  * @copyright CiviCRM LLC https://civicrm.org/licensing
  */
 
+use Civi\Api4\Participant;
+
 /**
  * Class for event form task actions.
  * FIXME: This needs refactoring to properly inherit from CRM_Core_Form_Task and share more functions.
@@ -28,6 +30,16 @@ class CRM_Event_Form_Task extends CRM_Core_Form_Task {
    */
   protected $_participantIds;
 
+  /**
+   * Rows to act on.
+   *
+   * Each row will have a participant ID & a contact ID using
+   * the keys the token processor expects.
+   *
+   * @var array
+   */
+  protected $rows = [];
+
   /**
    * Build all the data structures needed to build the form.
    *
@@ -83,14 +95,36 @@ public static function preProcessCommon(&$form) {
     $form->setNextUrl('event');
   }
 
+  /**
+   * Get the participant IDs.
+   *
+   * @return array
+   */
+  public function getIDs(): array {
+    return $this->_participantIds;
+  }
+
   /**
    * Given the participant id, compute the contact id
    * since its used for things like send email
    */
-  public function setContactIDs() {
-    $this->_contactIds = CRM_Core_DAO::getContactIDsFromComponent($this->_participantIds,
-      'civicrm_participant'
-    );
+  public function setContactIDs(): void {
+    $this->_contactIds = $this->getContactIDs();
+  }
+
+  /**
+   * Get the relevant contact IDs.
+   *
+   * @return array
+   */
+  protected function getContactIDs(): array {
+    if (isset($this->_contactIds)) {
+      return $this->_contactIds;
+    }
+    foreach ($this->getRows() as $row) {
+      $this->_contactIds[] = $row['contactId'];
+    }
+    return $this->_contactIds;
   }
 
   /**
@@ -119,4 +153,35 @@ public function addDefaultButtons($title, $nextType = 'next', $backType = 'back'
     ]);
   }
 
+  /**
+   * Get the rows form the search, keyed to make the token processor happy.
+   *
+   * @throws \API_Exception
+   */
+  public function getRows(): array {
+    if (empty($this->rows)) {
+      // checkPermissions set to false - in case form is bypassing in some way.
+      $participants = Participant::get(FALSE)
+        ->addWhere('id', 'IN', $this->getIDs())
+        ->setSelect(['id', 'contact_id'])->execute();
+      foreach ($participants as $participant) {
+        $this->rows[] = [
+          // We map to this funky format for the token processor :-(
+          'contactId' => $participant['contact_id'],
+          'participantId' => $participant['id'],
+        ];
+      }
+    }
+    return $this->rows;
+  }
+
+  /**
+   * Get the token processor schema required to list any tokens for this task.
+   *
+   * @return array
+   */
+  public function getTokenSchema(): array {
+    return ['participantId', 'contactId', 'eventId'];
+  }
+
 }
diff --git a/CRM/Event/Form/Task/PDF.php b/CRM/Event/Form/Task/PDF.php
index 778a195f2bab..0f0d25436f4f 100644
--- a/CRM/Event/Form/Task/PDF.php
+++ b/CRM/Event/Form/Task/PDF.php
@@ -48,21 +48,7 @@ class CRM_Event_Form_Task_PDF extends CRM_Event_Form_Task {
   public function preProcess() {
     $this->preProcessPDF();
     parent::preProcess();
-
-    // we have all the participant ids, so now we get the contact ids
-    parent::setContactIDs();
-
     $this->assign('single', $this->_single);
   }
 
-  /**
-   * List available tokens for this form.
-   *
-   * @return array
-   */
-  public function listTokens() {
-    $tokens = CRM_Core_SelectValues::contactTokens();
-    return $tokens;
-  }
-
 }
diff --git a/CRM/Event/ParticipantTokens.php b/CRM/Event/ParticipantTokens.php
index 5733e10af9e2..f33af5d2b545 100644
--- a/CRM/Event/ParticipantTokens.php
+++ b/CRM/Event/ParticipantTokens.php
@@ -10,6 +10,7 @@
  +--------------------------------------------------------------------+
  */
 
+use Civi\Token\Event\TokenValueEvent;
 use Civi\Token\TokenRow;
 
 /**
@@ -42,6 +43,21 @@ public function getCurrencyFieldName(): array {
     return ['fee_currency'];
   }
 
+  /**
+   * To handle variable tokens, override this function and return the active tokens.
+   *
+   * @param \Civi\Token\Event\TokenValueEvent $e
+   *
+   * @return mixed
+   */
+  public function getActiveTokens(TokenValueEvent $e) {
+    $messageTokens = $e->getTokenProcessor()->getMessageTokens();
+    if (!isset($messageTokens[$this->entity])) {
+      return isset($messageTokens['event']) ? ['event_id'] : FALSE;
+    }
+    return parent::getActiveTokens($e);
+  }
+
   /**
    * Get any tokens with custom calculation.
    */
diff --git a/CRM/Member/Form/Task/PDFLetter.php b/CRM/Member/Form/Task/PDFLetter.php
index d50dcffddb44..f7464b1b705f 100644
--- a/CRM/Member/Form/Task/PDFLetter.php
+++ b/CRM/Member/Form/Task/PDFLetter.php
@@ -137,4 +137,13 @@ public function generateHTML($membershipIDs, $messageToken, $html_message): arra
     return $html;
   }
 
+  /**
+   * Get the token processor schema required to list any tokens for this task.
+   *
+   * @return array
+   */
+  public function getTokenSchema(): array {
+    return ['membershipId', 'contactId'];
+  }
+
 }