Yes, every transaction you can do in RMPro can be back-dated to the original date (and time) that it actually happened. This is important when entering historical information, not only for the customer invoices but also for purchase orders (inventory). That’s because RMPro does extensive checks to make sure it’s really possible to do certain transactions at a given time. For example, suppose you received an item in RMPro on today’s date and tried to invoice that item to a customer dated 1 week ago. In that case, RMPro will not let you because the item didn’t exist in RMPro 1 week ago.