One of the State lotteries (can�t remember which one), failed to load the number 9 ball in its draw for many weeks. Eventually the error came to light; the operator offered to refund anyone who had selected the number during the relevant period � the catch was that you had to have your lottery ticket as proof. But at least they were willing to fund some money � the moral is hold on to your loosing lottery tickets.
On another occasion, five people won one of the State lotteries with 5 correct numbers out of 6 � the catch was that all five people had selected the same 6 numbers. The lottery operator smelt a rat and investigated. Their investigation revealed that the five people had all taken their numbers from a slip out of a Chinese �fortune cookie� � further investigation revealed that the fortune cookie manufacturer used the same 6 lucky lottery numbers for all their fortune cookies.
The fact that the lottery operators are willing to investigate such occurrences, suggests some might be on the level.