diff --git a/.github/workflows/validate_submission.yml b/.github/workflows/validate_submission.yml
index fd49f63..3f0047a 100644
--- a/.github/workflows/validate_submission.yml
+++ b/.github/workflows/validate_submission.yml
@@ -41,6 +41,45 @@ jobs:
             echo "$file was changed"
           done
 
+
+      # Look for file outside allowed folders
+      # ---------------------------------------
+      - name: Check if file are outside the allowed folders
+        run: |          
+          # List of allowed folders
+          ALLOWED_FOLDERS=("model-output/" "model-metadata/")
+          
+          # Init var for not allowed files
+          FILES_OUTSIDE_FOLDERS=""
+          
+          # Iterate over changes
+          for FILE in $(echo ${{ steps.changed-files.outputs.all_changed_files }} | jq -r '.[]'); do
+            MATCH_FOUND=false
+            
+            # Check if file is under an allowed folder
+            for FOLDER in "${ALLOWED_FOLDERS[@]}"; do
+              if [[ "$FILE" == "$FOLDER"* ]]; then
+                MATCH_FOUND=true
+                break
+              fi
+            done
+            
+            # If not mathced, add to forbidden list
+            if [ "$MATCH_FOUND" = false ]; then
+              FILES_OUTSIDE_FOLDERS="${FILES_OUTSIDE_FOLDERS} $FILE"
+            fi
+          done
+          
+          # If one or more file outside allowed folders are present, submission fails
+          if [ ! -z "$FILES_OUTSIDE_FOLDERS" ]; then
+            echo "Error: PR contains files outside the allowed folders."
+            echo "Files outside allowed folders: $FILES_OUTSIDE_FOLDERS"
+            exit 1
+          fi
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+
+
       - uses: r-lib/actions/setup-r@v2
         with:
           install-r: false