Go to the website, Cheaters.com and scroll down the bottom of the site and click on "Is Your Partner Cheating?" Submit your case.
Carefully read the Terms and Conditions before accepting the disclaimer. If you accept, you must follow the rules for your case to be successful (if you are approved).
Fill out the necessary information on the Case Application Form about yourself and the suspect.
Hit "Submit." You might not hear from "Cheaters" for two weeks or longer.