diff --git a/.hunspell.en.dic b/.hunspell.en.dic
index de60b2b57..b5e75815b 100644
--- a/.hunspell.en.dic
+++ b/.hunspell.en.dic
@@ -1214,3 +1214,4 @@ TSC
 coc
 ov
 readme
+DCO
diff --git a/CONTRIBUTING.rst b/CONTRIBUTING.rst
index eecee3b1e..432f565fa 100644
--- a/CONTRIBUTING.rst
+++ b/CONTRIBUTING.rst
@@ -65,7 +65,7 @@ Submitting patches
   read the `don't be afraid to commit`_ tutorial.
 
 .. _GitHub: https://github.com/
-.. _don't be afraid to commit: https://dont-be-afraid-to-commit.readthedocs.io/en/latest/index.html
+.. _don't be afraid to commit: https://afraid-to-commit.readthedocs.io/en/latest/index.html
 
 Start coding
 ~~~~~~~~~~~~
@@ -78,9 +78,10 @@ Start coding
 * Include tests that cover any code changes you make. Make sure the test fails
   without your patch.
 * `Run the tests <running-the-tests_>`_ and `verify coverage <running-test-coverage_>`_.
+* `Sign-off your commits <developer-certificate-of-origin_>`_.
 * Push your commits to GitHub and `create a pull request`_.
 
-.. _committing as you go: https://dont-be-afraid-to-commit.readthedocs.io/en/latest/git/commandlinegit.html#commit-your-changes
+.. _committing as you go: https://afraid-to-commit.readthedocs.io/en/latest/git/commandlinegit.html#commit-your-changes
 .. _create a pull request: https://help.github.com/articles/creating-a-pull-request/
 .. _Tcl 8.5 commands reference: https://www.tcl-lang.org/man/tcl8.5/TclCmd/contents.htm
 
@@ -234,6 +235,45 @@ Coding conventions
 
 .. _Tcl minimal escaping style: https://wiki.tcl-lang.org/page/Tcl+Minimal+Escaping+Style
 
+.. _developer-certificate-of-origin:
+
+Developer Certificate of Origin (DCO)
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+In order to ensure that all contributions are properly authorized and in
+compliance with licensing requirements, Modules project follows the `Developer
+Certificate of Origin (DCO)`_ process. The DCO is a lightweight mechanism to
+certify that you, as a contributor, have the right to submit your code and
+agree to the project’s licensing terms.
+
+How to sign off your commits
+""""""""""""""""""""""""""""
+
+Every commit must include a ``Signed-off-by`` line, which certifies that the
+contribution adheres to the DCO. You can do this by adding the following line
+at the end of your commit message::
+
+    Signed-off-by: Your Name <your.email@example.com>
+
+The name and email must match your Git configuration (``git config user.name``
+and ``git config user.email``).
+
+To simplify the process, you can use the ``-s`` flag of ``git`` command when
+committing::
+
+    git commit -s -m "Your commit message"
+
+Verifying DCO Compliance
+""""""""""""""""""""""""
+
+Modules repository automates checks to enforce the DCO. If your contribution
+does not include the proper ``Signed-off-by`` line, the pull request check
+will fail. You will need to amend your commit::
+
+    git commit --amend -s
+
+.. _Developer Certificate of Origin (DCO): https://developercertificate.org/
+
 .. _commit-hooks:
 
 Commit hooks
diff --git a/NEWS.rst b/NEWS.rst
index 989738d58..44bcedb67 100644
--- a/NEWS.rst
+++ b/NEWS.rst
@@ -31,6 +31,8 @@ Modules 5.6.0 (not yet released)
   issue #565)
 * Doc: advertise the `Modules chat room`_ (``#modules:matrix.org``) to discuss
   with the community.
+* Doc: describe the :ref:`developer-certificate-of-origin` process now applied
+  on contributions.
 
 .. _Security policy: https://github.com/envmodules/modules/blob/main/SECURITY.md
 .. _Modules chat room: https://matrix.to/#/#modules:matrix.org
diff --git a/doc/source/index.rst b/doc/source/index.rst
index a5d86dc96..06313222d 100644
--- a/doc/source/index.rst
+++ b/doc/source/index.rst
@@ -141,9 +141,6 @@ A :ref:`cookbook` of recipes describes how to use the various features of
 Modules and how to extend the :command:`module` command to achieve specific
 needs.
 
-If you have questions, comments or development suggestions for the Modules
-community, please read the :ref:`CONTRIBUTING` guide.
-
 Links
 -----