diff --git a/app/plugins/Transmogrify/config/schema/tables.json b/app/plugins/Transmogrify/config/schema/tables.json
index 3da5ec51e..9cdb15f19 100644
--- a/app/plugins/Transmogrify/config/schema/tables.json
+++ b/app/plugins/Transmogrify/config/schema/tables.json
@@ -368,6 +368,27 @@
         },
         "postTable": "migrateExtendedAttributesToAdHocAttributes"
     },
+    "notifications": {
+        "source": "cm_co_notifications",
+        "displayField": "id",
+        "addChangelog": true,
+        "fieldMap": {
+            "subject_co_person_id": "subject_person_id",
+            "subject_co_group_id": "subject_group_id",
+            "actor_co_person_id": "actor_person_id",
+            "recipient_co_person_id": "recipient_person_id",
+            "recipient_co_group_id": "recipient_group_id",
+            "resolver_co_person_id": "resolver_person_id",
+            "action": "&mapNotificationAction",
+            "source_url": "source",
+            "source_controller": null,
+            "source_action": null,
+            "source_id": null,
+            "source_arg0": null,
+            "source_val0": null,
+            "email_body": "email_body_text"
+        }
+    },
     "history_records": {
         "source": "cm_history_records",
         "displayField": "id",
diff --git a/app/plugins/Transmogrify/src/Command/TransmogrifyCommand.php b/app/plugins/Transmogrify/src/Command/TransmogrifyCommand.php
index 73a325a1e..b218d365b 100644
--- a/app/plugins/Transmogrify/src/Command/TransmogrifyCommand.php
+++ b/app/plugins/Transmogrify/src/Command/TransmogrifyCommand.php
@@ -44,6 +44,7 @@
 use Doctrine\DBAL\Exception;
 use Doctrine\DBAL\Exception\ForeignKeyConstraintViolationException;
 use Transmogrify\Lib\Enum\TransmogrifyEnum;
+use Transmogrify\Lib\Traits\ActionCodeMapperTrait;
 use Transmogrify\Lib\Traits\CacheTrait;
 use Transmogrify\Lib\Traits\HookRunnersTrait;
 use Transmogrify\Lib\Traits\ManageDefaultsTrait;
@@ -51,13 +52,14 @@
 use Transmogrify\Lib\Traits\TypeMapperTrait;
 use Transmogrify\Lib\Util\CommandLinePrinter;
 use Transmogrify\Lib\Util\DbInfoPrinter;
-use Transmogrify\Lib\Util\RawSqlQueries;
-use Transmogrify\Lib\Util\OrgIdentitiesHealth;
 use Transmogrify\Lib\Util\GroupsHealth;
+use Transmogrify\Lib\Util\OrgIdentitiesHealth;
+use Transmogrify\Lib\Util\RawSqlQueries;
 
 class TransmogrifyCommand extends BaseCommand {
   use CacheTrait;
   use TypeMapperTrait;
+  use ActionCodeMapperTrait;
   use RowTransformationTrait;
   use ManageDefaultsTrait;
   use HookRunnersTrait;
@@ -288,7 +290,7 @@ public function execute(Arguments $args, ConsoleIo $io): int
       if(!empty($this->tables[$t]['source'])) {
         $src = $this->tables[$t]['source'];
         if (!$this->tableExists($src)) {
-          $this->io->warning("Source table '$src' does not exist in source database, skipping table '$t'");
+          $this->cmdPrinter->warning("Source table '$src' does not exist in source database, skipping table '$t'");
           continue;
         }
       }
diff --git a/app/plugins/Transmogrify/src/Lib/Traits/ActionCodeMapperTrait.php b/app/plugins/Transmogrify/src/Lib/Traits/ActionCodeMapperTrait.php
new file mode 100644
index 000000000..2cad53c17
--- /dev/null
+++ b/app/plugins/Transmogrify/src/Lib/Traits/ActionCodeMapperTrait.php
@@ -0,0 +1,240 @@
+<?php
+
+/**
+ * COmanage Registry Transmogrify Command / Action Code Mapper Trait
+ *
+ * Portions licensed to the University Corporation for Advanced Internet
+ * Development, Inc. ("UCAID") under one or more contributor license agreements.
+ * See the NOTICE file distributed with this work for additional information
+ * regarding copyright ownership.
+ *
+ * UCAID licenses this file to you under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with the
+ * License. You may obtain a copy of the License at:
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * @link          https://www.internet2.edu/comanage COmanage Project
+ * @package       registry
+ * @since         COmanage Registry v5.2.0
+ * @license       Apache License, Version 2.0 (http://www.apache.org/licenses/LICENSE-2.0)
+ */
+
+declare(strict_types = 1);
+
+namespace Transmogrify\Lib\Traits;
+
+trait ActionCodeMapperTrait
+{
+  /**
+   * v4 ActionEnum codes that map directly to v5 ActionEnum codes (same code).
+   *
+   * Keys are v4 right-hand codes, values are v5 right-hand codes.
+   *
+   * @var array<string, string>
+   */
+  protected const ACTION_CODE_DIRECT_MAP = [
+    // Authenticators
+    'EAUT' => 'EAUT', // AuthenticatorEdited
+
+    // Comments
+    'CMNT' => 'CMNT', // CommentAdded
+
+    // Email
+    'EMLV' => 'EMLV', // EmailAddressVerified -> EmailVerified
+    'EMLS' => 'EMLS', // EmailAddressVerifyReqSent -> EmailVerifyCodeSent
+
+    // External Identity / Login env
+    'EOIE' => 'EOIE', // OrgIdEditedLoginEnv -> ExternalIdentityLoginUpdate
+
+    // Groups
+    'ACGR' => 'ACGR', // CoGroupAdded -> GroupAdded
+    'DCGR' => 'DCGR', // CoGroupDeleted -> GroupDeleted
+    'ECGR' => 'ECGR', // CoGroupEdited -> GroupEdited
+
+    // Group Members
+    'ACGM' => 'ACGM', // CoGroupMemberAdded -> GroupMemberAdded
+    'DCGM' => 'DCGM', // CoGroupMemberDeleted -> GroupMemberDeleted
+    'ECGM' => 'ECGM', // CoGroupMemberEdited -> GroupMemberEdited
+
+    // Identifiers / Matching
+    'AIDA' => 'AIDA', // IdentifierAutoAssigned
+    'UMAT' => 'UMAT', // MatchAttributesUpdated
+
+    // Names
+    'PNAM' => 'PNAM', // NamePrimary
+
+    // Notifications
+    'NOTA' => 'NOTA', // NotificationAcknowledged
+    'NOTX' => 'NOTX', // NotificationCanceled
+    'NOTD' => 'NOTD', // NotificationDelivered
+    'NOTR' => 'NOTR', // NotificationResolved
+
+    // Person pipeline
+    'ACPP' => 'ACPP', // CoPersonAddedPetition -> PersonAddedPetition
+    'ACPL' => 'ACPL', // CoPersonAddedPipeline -> PersonAddedPipeline
+    'MCPL' => 'MCPL', // CoPersonMatchedPipeline -> PersonMatchedPipeline
+
+    // Person status
+    'RCPS' => 'RCPS', // CoPersonStatusRecalculated -> PersonStatusRecalculated
+
+    // Petitions
+    'CPPC' => 'CPPC', // CoPetitionCreated -> PetitionCreated
+    'CPUP' => 'CPUP', // CoPetitionUpdated -> PetitionUpdated
+
+    // Reference ID
+    'OIDR' => 'OIDR', // ReferenceIdentifierObtained
+  ];
+
+  /**
+   * v4 codes that map to v5 ActionEnum with a changed code.
+   *
+   * @var array<string, string>
+   */
+  protected const ACTION_CODE_RENAMED_MAP = [
+    // CoPersonRoleRelinked (LCRM) -> PersonRoleRelinked (LCPR)
+    'LCRM' => 'LCPR',
+  ];
+
+  /**
+   * v4 ActionEnum codes that moved to PetitionActionEnum in v5.
+   *
+   * Keys are v4 codes, values are v5 PetitionActionEnum codes.
+   *
+   * @var array<string, string>
+   */
+  protected const ACTION_CODE_PETITION_MAP = [
+    // Invitations moved into PetitionActionEnum
+    'INVC' => 'IC', // InvitationConfirmed -> Accepted
+    'INVD' => 'PX', // InvitationDeclined -> Declined
+    'INVV' => 'IV', // InvitationViewed -> InvitationViewed
+    // 'INVE' => null, // InvitationExpired (no explicit equivalent)
+    // 'INVS' => null, // InvitationSent (no explicit equivalent)
+  ];
+
+  /**
+   * Optional/opinionated mappings to collapse specific attribute events (names)
+   * into v5’s generic MVEA* events. Disabled by default for correctness.
+   *
+   * @var array<string, string>
+   */
+  protected const ACTION_CODE_OPTIONAL_OPINIONATED_MAP = [
+    // Names -> generic Multi-Valued Extended Attribute events
+    'ANAM' => 'AMVE', // NameAdded    -> MVEAAdded
+    'ENAM' => 'EMVE', // NameEdited   -> MVEAEdited
+    'DNAM' => 'DMVE', // NameDeleted  -> MVEADeleted
+  ];
+
+  /**
+   * Map a v4 ActionEnum right-hand code to v5.
+   *
+   * Returns:
+   * - enum: 'ActionEnum' | 'PetitionActionEnum' | null
+   * - code: string|null
+   *
+   * When enum is null, there is no v5 equivalent; callers can log/skip.
+   *
+   * @param string $v4Code
+   * @param bool   $enableOpinionated Enable optional generalized mappings (default=false)
+   * @return array{enum: string|null, code: string|null}
+   */
+  protected function mapActionCode(string $v4Code, bool $enableOpinionated = false): array
+  {
+    $key = strtoupper(trim($v4Code));
+
+    if (isset(self::ACTION_CODE_DIRECT_MAP[$key])) {
+      return ['enum' => 'ActionEnum', 'code' => self::ACTION_CODE_DIRECT_MAP[$key]];
+    }
+
+    if (isset(self::ACTION_CODE_RENAMED_MAP[$key])) {
+      return ['enum' => 'ActionEnum', 'code' => self::ACTION_CODE_RENAMED_MAP[$key]];
+    }
+
+    if (isset(self::ACTION_CODE_PETITION_MAP[$key])) {
+      return ['enum' => 'PetitionActionEnum', 'code' => self::ACTION_CODE_PETITION_MAP[$key]];
+    }
+
+    if ($enableOpinionated && isset(self::ACTION_CODE_OPTIONAL_OPINIONATED_MAP[$key])) {
+      return ['enum' => 'ActionEnum', 'code' => self::ACTION_CODE_OPTIONAL_OPINIONATED_MAP[$key]];
+    }
+
+    return ['enum' => null, 'code' => null];
+  }
+
+  /**
+   * Convenience: map from a row array. Tries 'action' first, then 'action_code'.
+   *
+   * @param array $row
+   * @param bool  $enableOpinionated
+   * @return array{enum: string|null, code: string|null}
+   */
+  protected function mapActionFromRow(array $row, bool $enableOpinionated = false): array
+  {
+    $code = null;
+
+    if (isset($row['action']) && is_string($row['action'])) {
+      $code = $row['action'];
+    }
+
+    if ($code === null) {
+      return ['enum' => null, 'code' => null];
+    }
+
+    return $this->mapActionCode($code, $enableOpinionated);
+  }
+
+  /**
+   * Map a cm_co_notifications row’s action code to a v5 ActionEnum code.
+   * For notifications we only accept ActionEnum; PetitionActionEnum mappings return null.
+   */
+  protected function mapNotificationAction(array $row): ?string
+  {
+    $m = $this->mapActionFromRow($row);
+
+    if ($m['enum'] === 'ActionEnum') {
+      return $m['code'];
+    }
+
+    // No ActionEnum equivalent (eg, invitation events that moved to PetitionActionEnum)
+    $rawCode = null;
+    if (isset($row['action']) && is_string($row['action'])) {
+      $rawCode = $row['action'];
+    }
+
+    if ($rawCode !== null && isset($this->cmdPrinter)) {
+      $unmapped = $this->listUnmappedActionCodes([$rawCode], false);
+      if (!empty($unmapped)) {
+        $this->cmdPrinter->warning(sprintf('Skipping notification with unmapped action code: %s', $unmapped[0]));
+      }
+    }
+
+    return null;
+  }
+
+  /**
+   * Report which v4 action codes won’t map under current settings.
+   *
+   * @param string[] $seenV4Codes
+   * @param bool     $enableOpinionated
+   * @return string[]
+   */
+  protected function listUnmappedActionCodes(array $seenV4Codes, bool $enableOpinionated = false): array
+  {
+    $unmapped = [];
+
+    foreach ($seenV4Codes as $c) {
+      $m = $this->mapActionCode((string)$c, $enableOpinionated);
+      if ($m['enum'] === null) {
+        $unmapped[] = strtoupper(trim((string)$c));
+      }
+    }
+
+    return array_values(array_unique($unmapped));
+  }
+}