Register at the website yourself, if you find one that he's likely a member of.
This kind of proof can make a guy confess to an affair all on his own. If your spouse is looking for other women on online date sites, he's more than likely calling them too.
If he does paperless billing, you'll need his password to check the call log on the phone company's website.
(You just can't contact the other members without paying.) Once on the site, you may need to do some creative searching.
Browse by your general area or city, the city that your husband works in and by his major interests; any of these may turn up results. Even if your guy has his real name listed as public information on his profile, very few dating websites use names as a search option. If all else fails, you can always seek professional assistance.
As infidelity experts, good private investigators know all the tricks of the trade when it comes to finding out about a husband who cheats.
When it comes to figuring out how to find a cheating man on Internet dating sites, they may have a lot more luck in getting proof of your guy's online affair than you.
You can call the credit-card company and ask for specifics, if you are authorized on the account to do so.
You can also confront your husband about it, asking what exactly the charge was for.
Try to get the passwords that your husband uses for his email and any social-networking sites that you know he belongs to.
Check it out to see if he's responding to any flirtations or emails that are sent from online date places.
One trick a guy who cheats uses is to set up an email account that this wife doesn't know about to have his affair.