Anyone organising the office Melbourne Cup sweepstake is being warned by authorities to stick to the rules - or face hefty consequences.
There is also a limitation on prizes winners can receive - with specific warnings that firearms, liquor and sexual services are all banned from the prize list.
The Department of Internal Affairs has issued a warning in the lead-up to today's big race, telling office sweepstake organisers there should be "no horsing around'' when it comes to gambling rules.
"If you're holding the reins, make sure your sweepstake goes off without a hitch by following these rules, straight from the horse's mouth,'' a statements reads.
The prize money should not exceed $500 - otherwise, you will need to apply for a special licence, the DIA said.