This might be a little long. Hopefully easy to follow but should make a great feature for those of us who have service departments and offer follow up care for new bicycles.
Scenario: Customer is buying their new bike. This bike is a Serialized item. We offer after care and want to remind the customer to bring it back.
Currently the system just makes a transaction and your done.
Instead of this, The system Could Add that New Bike (Serialized Item) as a "serviced Item" on the customer card. Second to that, having the system ask the Cashier with a Prompt to "set a service Reminder Email" You should easily be able to say No, Set a custom date for the email to be scheduled or Pre Set a user defined Default.
This will also save time in the future when creating Workshop job as the Item already exists with it's serial number and will not need to be created.