Also on Sunday I entered the Classic milk competition, (after buying two bottles on Sat and entering on Sat without success) and received a text saying I won the daily $500, subject to validation and that someone would contact me regarding this! I waited until yesterday and finally the person rang, but as they could tell that I only entered twice there was no need for me to validate my entries, (an interesting point - has anyone else had this type of thing happen?) and they would send me the cheque!!!
When I won a $2500 spending spree they didn't bother wanting to see the receipts as I only entered twice. I think in a lot of cases they will only check receipts for people who enter a lot of times.