Horse-racing rules
What's the best way to understand an ante-post bet on a horse that changes trainer?
Direct answer
The bet usually follows the named horse, but special markets and eligibility changes can override the default.
How to use this answer
A definitive win, loss, void or refund cannot be established from the question alone. Identify the operator, the exact market, the date and the relevant official result, then check the rules that applied to the bet.
Racing bets can have different dead-heat, withdrawal, non-runner and each-way settlement conditions. Confirm the race time, final official result and the operator’s rule that applied when you placed the bet.