diff --git a/main.ipynb b/main.ipynb
index aa94ecf..a0ac301 100644
--- a/main.ipynb
+++ b/main.ipynb
@@ -4170,7 +4170,26 @@
     "    user: Dict = Security(get_current_user)\n",
     "):\n",
     "    data = await invitations_collection.find_one({'_id': ObjectId(invitation_id)})\n",
-    "    posts = await delivery_collection.find({'competition_id': data.get('competition').get('_id')}).to_list()\n",
+    "    cursor = delivery_collection.aggregate([\n",
+    "        {\"$match\": {\n",
+    "            \"$or\": [\n",
+    "                {\"sender._id\": user.get('_id')},\n",
+    "                {\"user._id\": user.get('_id')},\n",
+    "                {\"receiver._id\": user.get('_id')}\n",
+    "            ],\n",
+    "            'prod': PROD,\n",
+    "            'competition_id': data.get('competition').get('_id'),\n",
+    "        }},\n",
+    "        {\"$sort\": {\"_id\": -1}},\n",
+    "        {\"$group\": {\n",
+    "            \"_id\": \"$post_id\",\n",
+    "            \"doc\": {\"$first\": \"$$ROOT\"}\n",
+    "        }},\n",
+    "        {\"$replaceRoot\": {\"newRoot\": \"$doc\"}},\n",
+    "        {\"$sort\": {\"_id\": -1}},\n",
+    "    ])\n",
+    "\n",
+    "    posts = [doc async for doc in cursor]\n",
     "    return templates.TemplateResponse(\n",
     "        request=request, name=\"profile/invitation.html\", context={ \"user\": user, \"doc\": data, \"data\": posts}\n",
     "    )"