Whichever side of the table you are on in a transaction, data will need to be verified. The collection of this data is a mammoth task and will come at a point in a transaction when you are already overwhelmed with other responsibilities. Therefore, whether as a buyer or a seller, you may consider what you need to look at, or what you need to prepare for someone else to look at, sooner rather than later. This checklist can give you an idea of where to start.