Many previous Safety-Critical Systems Club events have featured presentations on how to present assurance, and how not to, but never how to receive assurance; how to be assured. If you were the owner and operator of anew system or service, how would you assess the assurance you have been given? Whether you are the Customer, the Customer’s Regulator, or the Customer’s Friend (“independent eyes”), you need to know what to look for in an assurance argument; this paper provides a guide to judging what is enough, or where more work needs to be done. Identifying what a reader needs to look for in assurance documentation will also inform authors what to include - and what to miss out.