Some customers want to be billed monthly for all work done within that month and pay for it all at once while others can be billed on a weekly basis for all work done that week or others are to be immediately invoiced for that ticket. It would be nice if an email (or notification on the UI) could be sent out that would look at the customer preferred billing detail and determine that they are due to be emailed the following day. This would really help to keep from forgetting to bill a customer or inadvertently sending an invoice to a customer that becomes irate, because they already told you to bill them a certain way. (This has happened to me before, but not with RepairShopr)