Tricking Amazon Ungating Process with Orders and Receipts

Hey guys quick question, Im kind of new to Amazon and have been selling for about 3 months. I have recently been taking off with some products that were ungated and see more potential with ones that are actually gated. The problem is the company with the product does not provide Invoices, only email confirmation for this great product.

I tried the technique many have said in the past to copy the screenshot on a PDF and submit it and was ungated successfully, but im actually kind of scare to invest and sell that item on amazon as my friend recently got his account locked for doing a similar approach on another product. My question for you guys is, how strict is amazon on these receipts ? How good are they at pin pointing fake ones ? If the approve and ungate you, can they still investigate ? I was thinking for example getting a PDF and putting invoice at the top and sending a screenshot of the order email. How risky is this ?