Your report is the result of your hard work. It shows the customer how good you are. The client needs to understand clearly the problems and the mitigations to resolve the issues. Don’t just submit your Nexpose or Nessus report, you should have your own template to follow if you want the best results of your work. I want to share with you an interesting template on the following link:
http://www.offensive-security.com/reports/penetration-testing-sample-report-2013.pdf