Fake orders

hey
i have to ecommerce on CF and every now and then some stupid bot place a bunch of fake orders and mess up my analytics data. does any1 know how to block it?
looks like the bot use different IP from different countries

Putting either a captcha or using a paid fraud prevention extension would prevent them from placing fake orders. You could also use bot fight mode, but it might not catch all of them as it is a relatively new system and needs time to mature.