We do not share an itemization of our spirit vetting process as it is proprietary to us and unfortunately when information was publicly shared in the past it was plagiarized by less than scrupulous sellers/sites, and tried to be passed off as their own. It is unfortunate, but because of those experiences of being copied & having our shared information used by sellers who popped up on social media or board sites to sell people things & then disappear, we limit what important information we publicly share for responsibility to our craft.
In short, our vetting process comes from a combination that includes, but is not limited to: years-long experience, from continued and prolonged work with spirits & entities, from the experience of knowing how to identify those we work with, carefully-crafted invocations & conjurations, and doing this full-time as the only work we do every day for years. There is no shortcut for experience and daily practice of a craft to hone skill, awareness, and knowledge of what you are doing.