anyone got a good solution for the following?:

We have a new patient (contact) who has exactly the same name as an existing patient.

In our clinical systems we differentiate by date of birth, but does anyone have any smart ideas how to differentiate in Books, so that when we create an invoice, the correct contact is chosen.

Using "Display Name" to differentiate is our first thought, but I understand that if we were to append date of birth in the field it would show on invoices etc.

Ideas?

Thanks!

James