diff --git a/telethon/types/_custom/tos.py b/telethon/types/_custom/tos.py
index 7b4f4c34..43ece84c 100644
--- a/telethon/types/_custom/tos.py
+++ b/telethon/types/_custom/tos.py
@@ -156,5 +156,11 @@ class TermsOfService:
 
         await self._client(_tl.fn.account.DeleteAccount('Decline ToS update'))
 
+    def __str__(self):
+        return self.markdown or '(empty ToS)'
+
+    def __repr__(self):
+        return f'TermsOfService({self.markdown!r})'
+
     def __bool__(self):
         return self._tos is not None