diff --git a/addons/hw_drivers/iot_handlers/drivers/PrinterDriver_L.py b/addons/hw_drivers/iot_handlers/drivers/PrinterDriver_L.py
index 0ee38a68a03..c17b30c8e2a 100644
--- a/addons/hw_drivers/iot_handlers/drivers/PrinterDriver_L.py
+++ b/addons/hw_drivers/iot_handlers/drivers/PrinterDriver_L.py
@@ -164,6 +164,10 @@ class PrinterDriver(Driver):
     def print_raw(self, data):
         process = subprocess.Popen(["lp", "-d", self.device_identifier], stdin=subprocess.PIPE)
         process.communicate(data)
+        if process.returncode != 0:
+            # The stderr isn't meaningful so we don't log it ('No such file or directory')
+            _logger.error('Printing failed: printer with the identifier "%s" could not be found',
+                          self.device_identifier)
 
     def print_receipt(self, data):
         receipt = b64decode(data['receipt'])
diff --git a/addons/hw_drivers/iot_handlers/interfaces/PrinterInterface_L.py b/addons/hw_drivers/iot_handlers/interfaces/PrinterInterface_L.py
index 4484f0d0c24..994a2d3d5cd 100644
--- a/addons/hw_drivers/iot_handlers/interfaces/PrinterInterface_L.py
+++ b/addons/hw_drivers/iot_handlers/interfaces/PrinterInterface_L.py
@@ -51,10 +51,11 @@ class PrinterInterface(Interface):
         return dict(self.printer_devices)
 
     def get_identifier(self, path):
+        allowed_characters = '[^a-zA-Z0-9_-]'
         if 'uuid=' in path:
-            identifier = sub('[^a-zA-Z0-9_]', '', path.split('uuid=')[1])
+            identifier = sub(allowed_characters, '', path.split('uuid=')[1])
         elif 'serial=' in path:
-            identifier = sub('[^a-zA-Z0-9_]', '', path.split('serial=')[1])
+            identifier = sub(allowed_characters, '', path.split('serial=')[1])
         else:
-            identifier = sub('[^a-zA-Z0-9_]', '', path)
+            identifier = sub(allowed_characters, '', path)
         return identifier