Hello, 

I am trying to import customer invoices for customers that have the same first and last name but cannot do this with the current ZoHo functionality.  I can see that the API provides us the ability to give a customer ID when importing an invoice; however, the standard import functionality will only give us a CSV file field composing of only a first and last name and not something discriminating such as a date of birth or another unique identifier.   This is also the issue when trying to import contacts with the same first and last name (where a "Date of Birth" field could be very helpful) especially, when contacts are fathers and sons with the same name and address.

 

Can you please implement an update to help with this?