To report a message, hover your mouse over the message you want to report and click on the 3 dots to the right of the message and select Report as spam or abuse.
If you are using the mobile version, tap and hold on the outline of the message you want to report. The option to report the message as spam or abuse will pop up.
To have contact requests checked, you can report them directly to us as spam. Open your contact request in the web version in your XING account. Click on the 3 dots and select Report as spam.