Validate User Name

I'm getting a lot of spurious registrations, all use the username = firstname lastname and some add a couple of random uppercase letters at the end. I've been trying to use the custom PERL RegEx in the Authorised Input field, but without success. Can someone point me in the right direction please.

If they set their username to their name that's not really any stopping that without code based validation to compare username against name, which is doable with CB Code Field since it provides Code Validation. Sounds like you're just getting spam registrations though which you can help protect against by using captcha provided by CB AntiSpam. Aside from that I'm not sure what kind of validation you're wanting.

Thanks Krileon. I was not specific enough, sorry. They set firstname= lastname. Username is firstname + +lastname, giving a username such as Abcdef Abcdef, sometimes Abcdef AbcdefKK. I would like to stop username being = firstname lastname, thus preventing this registration. It is possible that someone has the same first and last names, but not very likely.

Do you not have the username field available for them to actually supply a username? If not it's using the fallback behavior, which you can change what it falls back to within CB > Configuration > User Profile. Otherwise it seams odd they'd supply firstname and lastname also to the username field unless that's what they really wanted. Regardless no it's not possible to do that without some validation that can execute custom code so you'd need CB Code Field to do that.

Thanks for that. I've looked at CB Code Field but don't think it's for me but I'll probably give CB Antispam a go. Thanks for your help.