FYI - 4POS has had this feature for the last 3 years!!! Maybe just a lack of product info?
We have many customers that have hawkers come to the Change counter, present their coins, & then receive a voucher with a barcode on. They are then welcome to shop, & at the POS, present the voucher which is simply scanned & handled as a Credit on their purchase!
The opposite is also available on a take-away section where take aways are rung up, the customer could then browse & purchase more goods & then, once done, go to the POS to finalise it all.
I think the question started with that the dealer was asking if, rather than paying out change, a voucher could be issued.
I don't really think this is practical as I would not neccessarily overtender R100 or more simply to get a voucher - I would rather keep the cash in my pocket. So the question is - how much would be acceptable to offer as a voucher - a couple of cents?