diff --git a/api.py b/api.py
index 2b0576e..1c57b7e 100644
--- a/api.py
+++ b/api.py
@@ -5,6 +5,8 @@ import json
 
 from pydantic import BaseModel
 from datetime import datetime
+import tempfile
+from .qr_generator import QRCodeGenerator
 
 app = FastAPI(
     title="Print Server FastAPI",
@@ -81,6 +83,14 @@ def print_bill(data, address, waiter):
             printer.textln(text)
     printer.set(align='center', bold=False, height=1, width=1)
     printer.textln('==============================================\n')
+    if d["fe_cufe"]:
+        # printer.qr(d["fe_cufe"])
+        QR = QRCodeGenerator(d["fe_cufe"]).generate_qr()
+        with tempfile.NamedTemporaryFile(
+                delete=True, suffix='.png', dir='/tmp') as temp_file:
+            temp_filename = temp_file.name
+            QR.save(temp_filename)
+            printer.image(f"{temp_filename}")
     printer.text("Sigue nuestras redes sociales\n")
     printer.text("@bicipizza\n")
     printer.text("Recuerde que la propina es voluntaria.\n")
diff --git a/qr_generator.py b/qr_generator.py
index e552c72..ad36372 100644
--- a/qr_generator.py
+++ b/qr_generator.py
@@ -1,5 +1,7 @@
 #!/usr/bin/env python3
 import qrcode
+import tempfile
+import os
 
 
 class QRCodeGenerator:
@@ -8,8 +10,8 @@ class QRCodeGenerator:
     def __init__(self, url):
         self.url = url
 
-    def generate_qr(self, filename="codigo_qr.png"):
-        """Genera un código QR a partir de la URL y lo guarda en un archivo."""
+    def generate_qr(self):
+        """Genera un código QR a partir de la URL y lo guarda en un archivo temporal."""
         qr = qrcode.QRCode(
             version=1,
             error_correction=qrcode.constants.ERROR_CORRECT_L,
@@ -19,5 +21,5 @@ class QRCodeGenerator:
         qr.add_data(self.url)
         qr.make(fit=True)
         img = qr.make_image(fill_color="black", back_color="white")
-        img.save(filename)
-        return filename
+
+        return img
diff --git a/test/test_generate_qr.py b/test/test_generate_qr.py
index d510d06..34ab96b 100644
--- a/test/test_generate_qr.py
+++ b/test/test_generate_qr.py
@@ -7,6 +7,4 @@ from ..qr_generator import QRCodeGenerator
 def test_generate_qr():
     url = "https://www.gnu.org/"
     qr_generator = QRCodeGenerator(url)
-    filename = qr_generator.generate_qr("test_codigo_qr.png")
-    assert os.path.exists(filename)
-    os.remove(filename)
+    filename = qr_generator.generate_qr()