FINANCIAL_INVOICE_COPY FINANCIAL Endpoint
  /rpc/financial/?method=FINANCIAL_INVOICE_COPY  
  Add or update an invoice.

Click here to learn about financials locking.
 
  PARAMETERS TYPE NOTES
  DueDate   If not set, will default based on the contact's payment terms
  Id Numeric  
  Sent Y/N  
  SentDate    
  RETURN  
  id  
  EXAMPLE