diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index 2a4fa56d77..72a5555499 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -39,7 +39,7 @@ Documents under the docs/ directory will help you to change the specification. T
  * [Fixing a definition, the complete story](docs/validation-example.md)
 
 
-## Send your pull request
+## Send your pull request from a branch
 
 To fix any style issues and generate the outputs (that we store in git), please run:
 
@@ -56,5 +56,4 @@ Then, follow those steps:
   - If the API is unusable without the change -> every supported version
   - If the API is usable, but fix is on the response side -> every supported version
   - If the API is usable, but fix is on the request side -> no backport, unless the API is _partially_ usable and the fix unlocks a missing feature that has no workaround
-
-
+- Send the pull request from a branch, **not a fork**
diff --git a/README.md b/README.md
index 440f3192d9..85b7fbcb5e 100644
--- a/README.md
+++ b/README.md
@@ -245,7 +245,7 @@ If you need to download the recordings again, run `make validate-no-cache api=xp
 
 Once you see the errors, you can fix the original definition in `/specification`
 and then run the command again until the types validator does not trigger any new error.
-Finally open a pull request with your changes.
+Finally open a pull request with your changes. Please open it from a branch in the repository, and not from a fork.
 
 ## Documentation