Stop all contact immediately and report the matter to the dating site.
Report Unacceptable or Suspicious Behaviour - Nobody should have to put up with offensive, insulting and threatening behaviour online any more than they should or would if talking to someone in a bar or café. Don’t feel bad about cutting a date short if you’re not keen.
You are helping them and doing other users a favour. Agree on what you both want from it before you meet up. If you feel ready to move to a private environment, make sure your expectations match your date’s. Don’t be offended if your date is more guarded when meeting in person. Police and charities are here to help and support you.
Don't include your surname or any other identifying information such as your place of work either in your profile or when you first make contact.
Check to see if the person you're interested in is on other social networking sites like Facebook, do a web search to see if there are other records of the person online, and if possible use google image search to check the profile photos.
Money Requests Are Your Red Light - Why would someone need to borrow money off somebody they have never met, or only just met?
Membership means that the site has to commit to an industry code of practice that includes honest communication with users, protecting their privacy and providing a mechanism for reporting abuse.
Inclusion of the ODA's logo on the site indicates membership.
And a person can become a problem without having a record.