reporter: true.com, a dating site that requires a background check before users can become active. if you want to check up on someone while you re away from your computer, maybe on that first date, pull out your smartphone. there s an app for that. like date check. type in a name and state and for $14.95 get a criminal background check, property search, even social network profile. but a background check doesn t put a potential match completely in the clear. we feel like there s a lot of inaccuracies and incomplete data in these databases and that they provide a false sense of security. reporter: for rebecca, even a little bit of information about her attacker would have been welcomed. if somebody seems too good to be true they probably are. reporter: for abc news, i m becky worley.