If a non-runner is declared, it means that a selection will not be participating in the event.
The settlement process will depend on the type of bet that you placed.
Singles
If your selection is a non-runner your bet is made void, and your stake is returned.
Multiples
For bets such as Accumulators, if a selection is a non-runner, that selection is marked as void. However, your bet still stands and is settled on the remaining selections within the multiple.
For example, in a Treble, if one selection is a non-runner, the bet becomes a Double.
Important Tip
AntePost bets are All in, run or not, so should your selection withdraw, your bet will lose, unless otherwise stated.