My E - Comm client wants to know, how we can confidently say that the recent purchase is through our campaigns? Because they did some dummy purchases and our FB Campaign collected them as our results. So, with even genuine purchases we are registering, client is looking at them with some hesitation. Please let me know from where we can assure them about the correct campaign purchases or through which medium we can get the confirmation of Purchases? We have done Code implementation & Purchase Tag on Thank You Page already & FB is saying, We are all good with Pixel Setup. Thanks in Advance.