If you want to make an invoice but approve it for the client at a different date, set the not ready for billing (NRB) condition.

To set the condition, do this procedure.

1. Open the applicable invoice.
2. Select the arrow that is adjacent to the APPROVE button.
   
3. Select Set as not ready for billing.
   
   ezyVet shows a confirmation message:
   
   

   And the invoicing screen shows Not ready for billing:
   
   

The invoice has the not-ready-for-billing condition.