diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index dcbab8a11f81944ef1172b8c8791ea846a45b34b..ada6e7242b9cd083004f4d1a47bef5fa811ca221 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -1,3 +1,46 @@
 # Contributing
 
 If you have any issues or ideas for improvement you can contact me in the [CMK forum](https://forum.checkmk.com/) by sending me a direct message to `@thl-cmk` (this is the prefered way) or send an email to _thl-cmk[at]outlook[dot]com_.
+
+Please include:
+- your CMK version/edition
+- your environment (stand alone or distributed)
+- the OS of your CMK server(s)
+- the version of the plugin
+- the crash report (if any)
+
+I might also need the output of the check command. I.e.
+
+```
+~$ ./local/lib/nagios/plugins/check_ntp -H <your-ntp-server>
+Stratum: 3, Reference ID: 194.25.134.196, Time: Sun Apr  7 13:38:52 2024
+Stratum: 3
+Ref-ID: 194.25.134.196,
+Time: Sun Apr  7 13:38:52 2024
+Mode: server
+Version: 4
+Poll: 0
+Precision: -21
+Leap: no warning
+
+Perfdata
+Offset: -0.0051 s
+Delay: 0.0279 s
+Root dispersion: 0.0051 s
+
+Timestamps:
+Reference Timestamp (ref): 3921477760.322452
+Origin Timestamp (org): 3921478732.436456
+Receive Timestamp (rec): 3921478732.4453115
+Transmit Timestamp (xmt): 3921478732.4456544
+Destination Timestamp (dst): 3921478732.4647408
+
+Times
+ Reference time: 1712488960.322452
+ Origin time: 1712489932.4364562
+ Receive time: 1712489932.4453115
+ Transmit time: 1712489932.4456544
+ Destination time: 1712489932.4647408
+ | ntp_offset=-0.005115509033203125;0.2;0.5; ntp_delay=0.02794170379638672;0.2;0.5; ntp_root_dispersion=0.0051116943359375;200;500;
+
+```