diff --git a/payu/runlog.py b/payu/runlog.py
index 840cfaef..157c0135 100644
--- a/payu/runlog.py
+++ b/payu/runlog.py
@@ -12,6 +12,7 @@
 import shlex
 import subprocess
 import sys
+import warnings
 
 # Third party
 import requests
@@ -95,9 +96,18 @@ def commit(self):
         print(cmd)
         try:
             subprocess.check_call(shlex.split(cmd), stdout=f_null,
-                                  cwd=self.expt.control_path)
+                                  stderr=f_null, cwd=self.expt.control_path)
         except subprocess.CalledProcessError:
-            print('TODO: Check if commit is unchanged')
+            # Attempt commit without signing commits
+            cmd = f'git commit --no-gpg-sign -am "{commit_msg}"'
+            print(cmd)
+            try:
+                subprocess.check_call(shlex.split(cmd),
+                                      stdout=f_null,
+                                      cwd=self.expt.control_path)
+                warnings.warn("Runlog commit was commited without git signing")
+            except subprocess.CalledProcessError:
+                warnings.warn("Error occured when attempting to commit runlog")
 
         # Save the commit hash
         self.expt.run_id = commit_hash(self.expt.control_path)