Some shops refuse laser/credit cards on low amount purchases. It would defeat the sale of the goods when taking into account the cost of the transaction. It happened to me some time ago. had to purchase items over €10 to be able to pay by card.
Shops arent ATM machines after all.
Exactly what i was thinking. There's no right to demand cashback via laser.
"Q. Is there a minimum transaction limit that has to be reached before I can offer Cashback to a customer?
A. No. Once the customer has made a purchase for any value on his/her Laser Card, you are free to offer him/her Cashback."
The key word there is "free".
Having been involved in the initial stages of Laser I can tell you that cashback was aimed at displacing cheques. Cashback was seen as an added benefit, available to any particular Retailer to use as he/she sees fit.