An ante post bet is a bet placed before final declarations for a race.
You are backing a horse well in advance, sometimes weeks or even months before the race takes place.
The attraction is obvious. If you identify the right horse early, you may be able to take a much bigger price than will be available closer to race day.
The downside is that if your horse does not run, your stake is usually lost unless the bookmaker is offering special terms such as Non-Runner No Bet, often shortened to NRNB.

