does a multi page form require a captcha

[eluser]Corbee[/eluser]
Hi,

I have a multi page form where first three steps are ajax one page only involving entry of information, the next step is an ajax crud page, then the last page is an ajax three step submission form with branching.

So the question is, do I still need CAPTCHA? Or is a multipage spammable?

Thanks

[eluser]bretticus[/eluser]
If it really is a situation where you cannot complete the POST process without posting prerequisites (storing and checking data stored in a session for example) then probably, no: Your form would probably not be spammed due to the complexity. If it's something very desirable (the hacker has some motivation to customize the spamming to your website...) OR ... Your form can really be submitted by sending all the appropriate POST data to one URL (AJAX is not a buffer in this case because it's easy to read the URL out of the Javascript,) then your form is susceptible. CAPTCHA is about the only guarantee (and then some nefarious spammers even employ real people to solve them.)