diff --git a/NOTICE b/NOTICE
new file mode 100644
index 0000000..9816727
--- /dev/null
+++ b/NOTICE
@@ -0,0 +1,23 @@
+SmartThings-Local
+Copyright (c) 2026 Jack Nagy
+
+This software is licensed under the MIT License. See the LICENSE file for
+the full terms.
+
+------------------------------------------------------------------------
+Trademarks & disclaimer
+------------------------------------------------------------------------
+
+This is an independent, unofficial project. It is NOT affiliated with,
+authorised, endorsed, or sponsored by Samsung Electronics Co., Ltd. or any
+of its subsidiaries.
+
+"Samsung", "SmartThings", and any related names, marks, and logos are
+trademarks of Samsung Electronics Co., Ltd. They are used in this project
+only nominatively -- to identify the hardware and protocols this software
+interoperates with -- and no claim is made to any right in them. Use of
+these marks does not imply any affiliation with or endorsement by their
+owner.
+
+The software is provided for interoperability with hardware you own,
+without warranty of any kind.
diff --git a/README.md b/README.md
index d575aee..54f69f3 100644
--- a/README.md
+++ b/README.md
@@ -560,3 +560,13 @@ If reconnects become persistent (e.g. >10 in a minute) something's wrong: check
 ## Contributing
 
 If you submit a PR, please don't include real device UUIDs, MACs, serials, IPs, or bearer tokens. Use the placeholders from `.env.example`.
+
+---
+
+## Trademarks & disclaimer
+
+This is an independent, unofficial project. It is **not affiliated with, authorised, endorsed, or sponsored by Samsung Electronics Co., Ltd.** or any of its subsidiaries.
+
+"Samsung", "SmartThings", and any related names, marks, and logos are trademarks of Samsung Electronics Co., Ltd. They are used in this project **only nominatively** — to identify the hardware and protocols this software interoperates with — and no claim is made to any right in them. Use of these marks does not imply any affiliation with or endorsement by their owner.
+
+The software is provided under the [MIT License](LICENSE) for interoperability with hardware you own, without warranty of any kind.
diff --git a/pyproject.toml b/pyproject.toml
index 0706be1..4e5e25a 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -9,7 +9,7 @@ description = "Local CoAP-over-DTLS (OCF) transport + polling layer for Samsung
 readme = "README.md"
 requires-python = ">=3.11"
 license = "MIT"
-license-files = ["LICENSE"]
+license-files = ["LICENSE", "NOTICE"]
 authors = [{ name = "Jack Nagy" }]
 keywords = ["smartthings", "samsung", "ocf", "coap", "dtls", "home-assistant", "iot"]
 classifiers = [
@@ -60,5 +60,6 @@ include = [
     "tests",
     "README.md",
     "LICENSE",
+    "NOTICE",
     "pyproject.toml",
 ]