Fraud Filter

I want to block some people from placing cash on delivery orders based on their mobile number, as some customers keep on ordering cash on delivery then rejecting the order leading to losses. Shopify should add this feature either in this app or in Advanced cash on delivery app.

If the fraud analysis can tell us an order was placed from Turkey but the billing address was entered as SIngapore, we should be able to have a function that says "if the billing address entered is different from where the order is being placed, cancel"

Seems easy enough to use. For existing data perhaps its good, but that seems to mean that you would need to get scammed first before knowing what rule to set?
Would be great if there were some suggested rules that should be used, or maybe you could choose to have your fraud data shared with others so that it can auto-create/suggest some fraud rules for you based on what others are setting

its very easy to setup and usGreat app

If your store is not based in the USA, this is a useless app to detect frauds. It's basically a filter for the data your customer types, it doesn't check credit cards, proxies, phone numbers, addresses and so on. You can't complaint about it though, as it's 100% free. If you're serious about preventing frauds, you need Subuno. Check it out on the app store.