Hi 
  
We provide Web Design services, where we charge clients according to following schedule: 
  
50% advance payment + 50% after completion 
  
So e.g. a client has to pay $200 for a web design service, he needs to pay $100 in advance and remaining after completion of the design. 
  
Now the problem is when we open an invoice for $200 and then "Add Payment" for $100 in it, it correctly shows that $100 is remaining as balance, but the problem is that the status of the invoice is "UNPAID" and the client will receive overdue payment emails saying that your invoice is still pending payment.  
  
The client will get annoyed as he has already paid 50% in advance as required. How should we resolve this issue? Should we open up two invoices? or is there any other good way of handling this? 
  
Thanks