diff --git a/pyrogram/client/client.py b/pyrogram/client/client.py
index 17833310..a6250d74 100644
--- a/pyrogram/client/client.py
+++ b/pyrogram/client/client.py
@@ -199,6 +199,8 @@ class Client(Methods, BaseClient):
         self.is_started = True
 
         if self.user_id is None:
+            print(self.TOS)
+
             if self.token is None:
                 self.authorize_user()
             else:
diff --git a/pyrogram/client/ext/base_client.py b/pyrogram/client/ext/base_client.py
index 578cf168..a3279157 100644
--- a/pyrogram/client/ext/base_client.py
+++ b/pyrogram/client/ext/base_client.py
@@ -26,6 +26,16 @@ from ...session.internals import MsgId
 
 
 class BaseClient:
+    TOS = (
+        "By using Pyrogram you accept Telegram's Terms of Service (https://telegram.org/tos) and agree not to:\n\n"
+
+        "- Use the library to send spam or scam users.\n"
+        "- Promote violence on publicly viewable Telegram bots, groups or channels.\n"
+        "- Post illegal pornographic content on publicly viewable Telegram bots, groups or channels.\n\n"
+
+        "We reserve the right to update these Terms of Service later.\n"
+    )
+
     INVITE_LINK_RE = re.compile(r"^(?:https?://)?(?:www\.)?(?:t(?:elegram)?\.(?:org|me|dog)/joinchat/)([\w-]+)$")
     BOT_TOKEN_RE = re.compile(r"^\d+:[\w-]+$")
     DIALOGS_AT_ONCE = 100