diff --git a/composer.json b/composer.json
index 7cf8fde..b0c00fa 100644
--- a/composer.json
+++ b/composer.json
@@ -32,6 +32,7 @@
         "scienta/doctrine-json-functions": "^6.3",
         "setasign/fpdf": "^1.8",
         "setasign/fpdi": "^2.5",
+        "spatie/blink": "^1.4",
         "spatie/icalendar-generator": "^2.5",
         "symfony/apache-pack": "^1.0",
         "symfony/asset": "6.4.*",
diff --git a/composer.lock b/composer.lock
index 1bc2382..5756f2a 100644
--- a/composer.lock
+++ b/composer.lock
@@ -4,7 +4,7 @@
         "Read more about it at https://getcomposer.org/doc/01-basic-usage.md#installing-dependencies",
         "This file is @generated automatically"
     ],
-    "content-hash": "52ec6ca4d15ec27e3586b5bab26b528c",
+    "content-hash": "0bd1cb4a8201fb9558138001813bec5a",
     "packages": [
         {
             "name": "beberlei/doctrineextensions",
@@ -3371,6 +3371,68 @@
             ],
             "time": "2025-02-05T13:22:35+00:00"
         },
+        {
+            "name": "spatie/blink",
+            "version": "1.4.0",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/spatie/blink.git",
+                "reference": "d2c12b84ba04d4c5b53d701cc09810bf7e5d546f"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/spatie/blink/zipball/d2c12b84ba04d4c5b53d701cc09810bf7e5d546f",
+                "reference": "d2c12b84ba04d4c5b53d701cc09810bf7e5d546f",
+                "shasum": ""
+            },
+            "require": {
+                "php": "^8.0"
+            },
+            "require-dev": {
+                "phpunit/phpunit": "^9.5"
+            },
+            "type": "library",
+            "autoload": {
+                "psr-4": {
+                    "Spatie\\Blink\\": "src"
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "Freek Van der Herten",
+                    "email": "freek@spatie.be",
+                    "homepage": "https://spatie.be",
+                    "role": "Developer"
+                }
+            ],
+            "description": "Cache that expires in the blink of an eye",
+            "homepage": "https://github.com/spatie/blink",
+            "keywords": [
+                "Blink",
+                "cache",
+                "caching",
+                "spatie"
+            ],
+            "support": {
+                "issues": "https://github.com/spatie/blink/issues",
+                "source": "https://github.com/spatie/blink/tree/1.4.0"
+            },
+            "funding": [
+                {
+                    "url": "https://spatie.be/open-source/support-us",
+                    "type": "custom"
+                },
+                {
+                    "url": "https://github.com/spatie",
+                    "type": "github"
+                }
+            ],
+            "time": "2023-07-19T18:28:44+00:00"
+        },
         {
             "name": "spatie/enum",
             "version": "3.13.0",
diff --git a/src/Command/StampUploadsCommand.php b/src/Command/StampUploadsCommand.php
index 16d78ad..35000df 100644
--- a/src/Command/StampUploadsCommand.php
+++ b/src/Command/StampUploadsCommand.php
@@ -6,8 +6,10 @@ namespace App\Command;
 
 use App\Entity\Disposition;
 use App\Entity\Upload;
+use App\Entity\User;
 use App\Service\Pdf\InvoiceApprover;
 use Doctrine\ORM\EntityManagerInterface;
+use Spatie\Blink\Blink;
 use Symfony\Component\Console\Attribute\AsCommand;
 use Symfony\Component\Console\Command\Command;
 use Symfony\Component\Console\Helper\ProgressBar;
@@ -42,8 +44,24 @@ class StampUploadsCommand extends Command
 
         $progressBar = new ProgressBar($output, count($dispositions));
         $progressBar->start();
+        $blink = new Blink();
+        $userRepository = $this->entityManager->getRepository(User::class);
 
         foreach ($dispositions as $disposition) {
+            /** @var Disposition $disposition */
+            $upload = $disposition->getDocumentByType(Upload::TYPE_INVOICE);
+            if (null === $upload->getApprovedBy()) {
+                $email = $upload->getUpdatedBy();
+                if ($blink->has($email)) {
+                    $approvingUser = $blink->get($email);
+                } else {
+                    $approvingUser = $userRepository->findOneBy(['email' => $email]);
+                    $blink->put($email, $approvingUser);
+                }
+                if (null !== $approvingUser) {
+                    $upload->setApprovedBy($approvingUser->getInitials());
+                }
+            }
             $this->invoiceApprover->render($disposition);
             $progressBar->advance();
         }