MINNEAPOLIS (Wireless Flash) -- Single women may worry about getting screwed over by a married man if they try an online dating service, but they don't have to.

According to Michael Lasky, the co-author of "Online Dating For Dummies" (Wiley), there are three surefire ways to detect and deflect cheaters while you're looking for love online.

No. 1: Steer clear of daters who don't post a picture of themselves in their online profile, because it's possible they're married and don't want to be recognized.

No. 2: Beware of folks who aren't paid members of a dating website. A married person would refrain from buying membership in a dating service because their spouse might see the charges on their credit card bill.

No. 3: Keep online cheaters from contacting you by posting a note in your profile which says you will only date singles and you'll squeal to the spouse if you find out they're married.