Fraud help

[LaraIskowicz]

Hi, I have got a few fradulent orders and have been charged some fees for cancelling. I need something simple to block these orders and auto cancel them. I changed the payments in shopify to this option "Automatically when the entire order is fulfilled Authorize payment at checkout and capture once the entire order is fulfilled" Do I need another app or should this be ok? I was comparing blockify and beacon but I have no idea what to do, do i even need them?