Add Content Apps to your types (coming up in v 3.1). You can use these to display other information related to them. For example you could display the payments done with a voucher. Of course this data has to come from a UI-O-Matic.
Adding a Content App
To add your content app you need to create a class that inherits from IUiomaticContentAppFactory.
public class VoucherHistoryContentApp : IUiomaticContentAppFactory