When we take a deposit on a job we partially invoice half then on completion invoice the remianing amount however this ends up creating 3 invoices in Xero, one when the quote is submitted as an order, the next when you partially invoice the deposit & the next when you invoice the remianing amount which leaves the original invoice sitting as draft in Xero which can be deleted by a setting in Factory, however deleted invoices dont look good on your books. I think a better solution would be be that when you invoice the remaining amount it uses the original invoice that was created instead of making a new one then deleting the original.