I just started personally dealing with invoices at work, and I overheard someone mention the term "pro forma invoice". I'm just curious as to what exactly a pro forma invoice is. H …

For our business, 90% of the time we charge our customers by credit card when they "checkout." As a result, we don't typically need to deal with invoicing them because we are paid …

I need to invoice a customer for water supply since 2003. Is there a limit to how far back you can charge the customer.