diff --git a/documentation/CONTRIBUTING b/documentation/CONTRIBUTING
index 1333ed7..4495d6b 100644
--- a/documentation/CONTRIBUTING
+++ b/documentation/CONTRIBUTING
@@ -1 +1,8 @@
-TODO
+Once you got a modification you want to send, create a commit using git and generate a patch file with the following command:
+
+$ git format-patch -M origin/master
+
+and when you have the patch file send it to the patch mailing list, possibly using git send-email like this:
+
+$ git send-email *.patch
+