Purchase.ReportingId field is empty after a successful payment

The "Purchase.ReportingId" field is blank after a successful payment, but for us this is a problem because we need this field to be able to attach the purchase to our own users, the question is, is this field left blank because we used a test user with an application that is not currently released?

If we try this with an App Lab released app, will the contents of the "Purchase.ReportingId" field be available to us?

We don't want to release the app with no guarantee that the ReportingId field will be filled, we want to avoid any potential problems