diff --git a/Plugin/OrderStatusHistoryCommentPlugin.php b/Plugin/OrderStatusHistoryCommentPlugin.php
index cf2979c7a..0b87bfaf4 100644
--- a/Plugin/OrderStatusHistoryCommentPlugin.php
+++ b/Plugin/OrderStatusHistoryCommentPlugin.php
@@ -45,9 +45,10 @@ public function __construct(CheckPaymentType $checkPaymentType)
     }
 
     /**
-     * Normalize Buckaroo refund notes.
+     * Normalize Buckaroo Plaza refund notes.
      *
      * Plaza refunds should always be shown as "online" and include the Plaza Transaction ID.
+     * Magento Admin offline refunds (no Plaza key) are left unchanged.
      *
      * @param Order $subject
      * @param string|\Magento\Framework\Phrase $comment
@@ -65,19 +66,18 @@ public function beforeAddStatusHistoryComment(Order $subject, $comment, $status
             return [$comment, $status];
         }
 
-        $updatedComment = preg_replace('/\boffline\b/ui', 'online', $commentText, 1) ?: $commentText;
-
         $transactionId = $this->getRefundTransactionId($subject);
         if (empty($transactionId)) {
-            return [$updatedComment, $status];
+            return [$comment, $status];
         }
 
+        $updatedComment = preg_replace('/\boffline\b/ui', 'online', $commentText, 1) ?: $commentText;
+
         $hasTransactionId = preg_match('/Transaction\s*ID\s*:\s*"/ui', $updatedComment) === 1;
         if (!$hasTransactionId) {
             return [$this->appendTransactionId($updatedComment, $transactionId), $status];
         }
 
-        // If Transaction ID exists but differs, override it with the latest credit memo transaction id.
         $updatedComment = preg_replace(
             '/Transaction\s*ID\s*:\s*"[^"]*"/ui',
             'Transaction ID: "' . $this->buildTransactionIdLink($transactionId) . '"',
@@ -126,7 +126,6 @@ private function appendTransactionId(string $commentText, string $transactionId)
      */
     private function buildTransactionIdLink(string $transactionId): string
     {
-        // Keep consistent with HtmlTransactionIdObserver's plaza link structure.
         $url = sprintf(
             'https://plaza.buckaroo.nl/Transaction/Transactions/Details?transactionKey=%s',
             $transactionId
diff --git a/Test/Unit/Plugin/OrderStatusHistoryCommentPluginTest.php b/Test/Unit/Plugin/OrderStatusHistoryCommentPluginTest.php
index ae26e0aa2..be926d61e 100644
--- a/Test/Unit/Plugin/OrderStatusHistoryCommentPluginTest.php
+++ b/Test/Unit/Plugin/OrderStatusHistoryCommentPluginTest.php
@@ -6,38 +6,40 @@
 use Buckaroo\Magento2\Service\CheckPaymentType;
 use Buckaroo\Magento2\Test\BaseTest;
 use Magento\Sales\Model\Order;
+use Magento\Sales\Model\Order\Payment;
 
 class OrderStatusHistoryCommentPluginTest extends BaseTest
 {
     protected $instanceClass = OrderStatusHistoryCommentPlugin::class;
 
-    public function testOfflineRefundCommentIsCleanedForBuckarooPayment(): void
+    public function testPlazaOfflineRefundCommentIsNormalizedToOnline(): void
     {
-        $orderMock = $this->getOrderMock();
+        $orderMock = $this->getOrderMock('A7BDD18D052843098E3461FE3EDA423B');
         $comment = 'We refunded $59.00 offline. Transaction ID: "A7BDD18D052843098E3461FE3EDA423B-capture"';
 
         $result = $this->getInstance([
             'checkPaymentType' => $this->getCheckPaymentTypeMock(true),
         ])->beforeAddStatusHistoryComment($orderMock, $comment, 'closed');
 
-        $this->assertSame(['We refunded $59.00 online. Transaction ID: "A7BDD18D052843098E3461FE3EDA423B-capture"', 'closed'], $result);
+        $this->assertStringContainsString('online', $result[0]);
+        $this->assertStringNotContainsString('offline', $result[0]);
     }
 
-    public function testOnlineRefundCommentIsLeftUntouched(): void
+    public function testAdminOfflineRefundCommentIsLeftUntouched(): void
     {
-        $orderMock = $this->getOrderMock();
-        $comment = 'We refunded $59.00 online. Transaction ID: "A7BDD18D052843098E3461FE3EDA423B-refund"';
+        $orderMock = $this->getOrderMock(null);
+        $comment = 'We refunded $59.00 offline. Transaction ID: "A7BDD18D052843098E3461FE3EDA423B-capture"';
 
         $result = $this->getInstance([
             'checkPaymentType' => $this->getCheckPaymentTypeMock(true),
-        ])->beforeAddStatusHistoryComment($orderMock, $comment, 'processing');
+        ])->beforeAddStatusHistoryComment($orderMock, $comment, 'closed');
 
-        $this->assertSame([$comment, 'processing'], $result);
+        $this->assertSame([$comment, 'closed'], $result);
     }
 
     public function testNonBuckarooOfflineRefundCommentIsLeftUntouched(): void
     {
-        $orderMock = $this->getOrderMock();
+        $orderMock = $this->getOrderMock(null);
         $comment = 'We refunded $59.00 offline. Transaction ID: "A7BDD18D052843098E3461FE3EDA423B-capture"';
 
         $result = $this->getInstance([
@@ -47,21 +49,15 @@ public function testNonBuckarooOfflineRefundCommentIsLeftUntouched(): void
         $this->assertSame([$comment, false], $result);
     }
 
-    public function testBuckarooNonRefundCommentContainingTransactionIdIsLeftUntouched(): void
+    private function getOrderMock(?string $plazaRefundTransactionKey): Order
     {
-        $orderMock = $this->getOrderMock();
-        $comment = 'Registered notification about captured amount of $59.00. Transaction ID: "A7BDD18D052843098E3461FE3EDA423B-capture"';
-
-        $result = $this->getInstance([
-            'checkPaymentType' => $this->getCheckPaymentTypeMock(true),
-        ])->beforeAddStatusHistoryComment($orderMock, $comment, 'processing');
-
-        $this->assertSame([$comment, 'processing'], $result);
-    }
-
-    private function getOrderMock(): Order
-    {
-        $paymentMock = $this->createMock(\Magento\Sales\Api\Data\OrderPaymentInterface::class);
+        $paymentMock = $this->getMockBuilder(Payment::class)
+            ->disableOriginalConstructor()
+            ->onlyMethods(['getAdditionalInformation'])
+            ->getMock();
+        $paymentMock->method('getAdditionalInformation')
+            ->with('buckaroo_refund_transaction_key')
+            ->willReturn($plazaRefundTransactionKey);
 
         $orderMock = $this->getMockBuilder(Order::class)
             ->disableOriginalConstructor()