Here are William Hills' golf rules. You be the judge. Dead heat or all bets void?
Golf Rules
Answer
In tournaments affected by adverse weather, bets will be settled on the official result regardless of the number of rounds played, unless there is no further play after a bet has been struck in which case it will be void.
A player is deemed to have played once they have teed off. In the event of a player withdrawing after having teed off, stakes will be lost on outright, group, match or 18 hole betting.
Outright Betting : Non-runner - no bet. Play-offs will determine the tournament winner. Dead heat rules will apply for placings
72-hole Match Betting : The winner will be the player achieving the highest placing at the end of the tournament (playoffs included). If one player misses the cut, the other is deemed the winner. Where both players miss the cut the lowest score after the cut has been made will determine settlement. If one player is disqualified, either prior to the completion of two rounds or after both players have made the cut, the other player is deemed the winner. If a player is disqualified during either the 3rd or 4th rounds, when his opponent has already missed the cut, the disqualified player is deemed the winner. A price will be offered for the tie and in the event of a tie bets on either player to win will be lost. Where a match bet involves three players (threesome) the conditions listed above will apply, except in the event of a tie where dead heat rules will apply. Non-runner - threesome void.
Group Betting / Top UK Player etc.: Groups will consist of four or more players and the winner will be the player achieving the highest placing at the end of the tournament. Any player missing the cut will be considered a loser. If all players miss the cut, the lowest score after the cut has been made will determine settlement. Players are grouped together for betting purposes only. Non-runner - no bet, deductions in line with Tattersalls' Rule 4(c) will apply. Dead heat rules apply except where the winner is determined by a play-off.
18 Hole Betting : The winner will be the player with the lowest score over 18 holes. In the event of a 2 or 3 ball being rearranged, bets will be settled on the original pairings / groups. Non-runner - 2 or 3 ball void. In 2 ball betting where a price is not offered for the tie, then bets will be void in the event of this happening. If a price is offered for a tie this will govern settlement. Dead heat rules will apply to 3 ball betting.
When special bets are offered grouping more than 3 players together over 18 holes (e.g. 7-ball, 9-ball, etc) dead-heat rules apply. Non-runner no-bet. Deductions in line with Tattersalls' Rule 4(c) will apply.
Dead Heat In a DEAD HEAT for a place the stake money on a selection is divided by the number of runners involved in the dead heat.
The full odds are then paid to the divided stake, with the remainder of the stake money being lost. E.g. a £30.00 each way bet @ 10/1 on a player who shares third place with two other players. As there are now three players sharing the same placing this reduces your bet to a £10.00 each way bet at the same odds of 10/1. Your remaining stake would be lost.