diff --git a/main.py b/main.py
index 73e71fc..b988076 100644
--- a/main.py
+++ b/main.py
@@ -5,6 +5,8 @@ from pathlib import Path
 import requests
 from dotenv import load_dotenv
 from pdfminer.high_level import extract_text
+from pdfminer.pdfdocument import PDFDocument
+from pdfminer.pdfparser import PDFParser
 
 from config import (
     MENU_CRECHE_PDF_URL,
@@ -16,51 +18,16 @@ from config import (
 from menus import Menus, MenuMessageFormatter
 from message_sender import SignalMessager
 from pdf_downloader import download
+from result_file import ResultFile
 
 load_dotenv()
 
-def send_signal_message(
-    days: list[str], menu: dict[str, dict[str, str]], menu_pdf_file: Path
-) -> None:
-    headers = {"Content-Type": "application/json"}
-    message = f"""
-**Menu de la crèche** (message automatique)
 
-Menu {MENU_TYPE}:
-
-{days[0].upper()}:
-*Midi*: {menu[days[0]]["midi"]}
-*Goûter*: {menu[days[0]]["gouter"]}
-
-{days[1].upper()}:
-*Midi*: {menu[days[1]]["midi"]}
-*Goûter*: {menu[days[1]]["gouter"]}
-
-{days[2].upper()}:
-*Midi*: {menu[days[2]]["midi"]}
-*Goûter*: {menu[days[2]]["gouter"]}
-
-{days[3].upper()}:
-*Midi*: {menu[days[3]]["midi"]}
-*Goûter*: {menu[days[3]]["gouter"]}
-
-{days[4].upper()}:
-*Midi*: {menu[days[4]]["midi"]}
-*Goûter*: {menu[days[4]]["gouter"]}
-"""
-    text_mode = "styled"
-    attachment = base64.b64encode(menu_pdf_file.read_bytes())
-    body = {
-        "message": message,
-        "text_mode": text_mode,
-        "number": SIGNAL_SENDER,
-        "recipients": SIGNAL_RECIPIENTS,
-        "base64_attachments": [
-            f"data:application/pdf;filename=menu.pdf;base64,{attachment.decode()}"
-        ],
-    }
-
-    requests.post(SIGNAL_API_URL, headers=headers, json=body)
+def read_pdf_metadata(pdf_file: Path):
+    fp = open(pdf_file, "rb")
+    parser = PDFParser(fp)
+    doc = PDFDocument(parser)
+    return doc.info
 
 
 def main():
@@ -68,12 +35,22 @@ def main():
 
     menus = Menus(menu_pdf_file)
 
+    pdf_metadata = read_pdf_metadata(menu_pdf_file)
+    creation_date = pdf_metadata[0]["CreationDate"].decode("utf-8").removeprefix("D:")
+    modification_date = pdf_metadata[0]["ModDate"].decode("utf-8").removeprefix("D:")
+
+    result_file = ResultFile(Path.home() / ".cache" / "menu_creche.txt")
+    if result_file.was_already_sent(creation_date, modification_date, MENU_TYPE):
+        return
+
     message_formatter = MenuMessageFormatter()
     message = message_formatter.create_message(menus, MENU_TYPE)
 
     signal_messager = SignalMessager(SIGNAL_API_URL, SIGNAL_SENDER)
     signal_messager.send_message(message, menu_pdf_file, SIGNAL_RECIPIENTS)
 
+    result_file.write(creation_date, modification_date, MENU_TYPE)
+
 
 if __name__ == "__main__":
     main()
diff --git a/menus.py b/menus.py
index 4811bc5..64215f0 100644
--- a/menus.py
+++ b/menus.py
@@ -1,12 +1,14 @@
-import base64
 from pathlib import Path
 
 from pdfminer.high_level import extract_text
+from pdfminer.pdfdocument import PDFDocument
+from pdfminer.pdfparser import PDFParser
 
 
 class Menus:
     def __init__(self, menu_pdf_file: Path):
         self.menu_pdf_file = menu_pdf_file
+        self.pdf_metadata = self.extract_pdf_metadata()
 
         self._cells = self.extract_cells()
         self.month = self.extract_month()
@@ -17,6 +19,12 @@ class Menus:
         self.petit_muscle = self.extract_petit_muscle_menu()
         self.petit_lion = self.extract_petit_lion_menu()
 
+    def extract_pdf_metadata(self):
+        fp = open(self.menu_pdf_file, "rb")
+        parser = PDFParser(fp)
+        doc = PDFDocument(parser)
+        return doc.info
+
     def extract_cells(self) -> list[str]:
         text = extract_text(self.menu_pdf_file, page_numbers=[0])
 
@@ -141,4 +149,3 @@ Menu {menu_type}:
 *Midi*: {menu[days[4]]["midi"]}
 *Goûter*: {menu[days[4]]["gouter"]}
 """
-
diff --git a/result_file.py b/result_file.py
new file mode 100644
index 0000000..c1c629f
--- /dev/null
+++ b/result_file.py
@@ -0,0 +1,20 @@
+from pathlib import Path
+
+
+class ResultFile:
+    def __init__(self, path: Path):
+        self.path = path
+
+    def write(self, creation_date: str, modification_date: str, menu_type: str) -> None:
+        if not self.path.exists():
+            self.path.write_text("")
+        with self.path.open(mode="a") as file:
+            file.write(f"{creation_date}/{modification_date}/{menu_type}\n")
+
+    def was_already_sent(
+        self, creation_date: str, modification_date: str, menu_type: str
+    ):
+        if not self.path.exists():
+            return False
+        content = self.path.read_text()
+        return f"{creation_date}/{modification_date}/{menu_type}\n" in content