diff --git a/wallamanta/account_checker.py b/wallamanta/account_checker.py
new file mode 100644
index 0000000..37d5d40
--- /dev/null
+++ b/wallamanta/account_checker.py
@@ -0,0 +1,14 @@
+import helpers
+import walladb
+import time
+
+def account_checker(sleep_time):
+    while True:
+        user_list = walladb.get_user_list()
+        for user in user_list:
+            if walladb.is_user_valid(user['telegram_user_id']):
+                if walladb.is_user_expired(user['telegram_user_id']):
+                    message = "¡Hola!\n\nTu cuenta ha caducado. Si quieres seguir usando @wallamanta_bot ponte en contacto con @jocarduck\n\n¡Gracias!"
+                    helpers.send_message(user['telegram_user_id'], message)
+                    walladb.deactivate_user(user['telegram_user_id'])
+        time.sleep(sleep_time)