Marking Invoices as Paid while Creating the Invoice

I use Ivy Pay instead of Stripe through UpHeal. I sent an invoice to a client and marked it as paid right away, but the email went through, indicating she hadn’t paid. She wrote back telling me it had been paid. I will have to warn all clients that this will happen every time, but it doesn’t make sense to do it this way. I want to be able to mark the invoice as paid when generating it, so clients receive a paid-in-full invoice instead of one that shows as unpaid when they have already paid. I also don’t want to have to email my clients every invoice. The only reason I generate them is to provide superbills.