diff --git a/README.md b/README.md
index 39e308f..9fe53de 100644
--- a/README.md
+++ b/README.md
@@ -16,13 +16,17 @@ Everest is part of the ATmosphere.
 5. Run `yarn dev` to start the development server.
 6. Open [http://localhost:3000](http://localhost:3000) with your browser.
 
-### Development
+## Contributing
 
 Before submitting any changes, ensure that the following steps have been performed:
 
 1. The code has been linted: `yarn lint`
     * Many errors and warnings can be fixed with `yarn lint --fix`.
 2. Any news files have the required license headers: `yarn license-headers`.
+3. Your comments are signed off (cf. [Developer Certificate of Origin](https://developercertificate.org/)).
+    * You can do this by adding the `--signoff` or `-s` option to `git commit` (e.g. `git commit -s`).
+    * You can sign off the previous commit with `git commit --amend --signoff`.
+    * You can sign off the last `<N>` commits with `git rebase --signoff HEAD~<N>`
 
 ## License