Sometimes there can be unforeseen circumstances which lead to an event being postponed or abandoned. There are specific rules relating to this.
If a match be abandoned after it has already commenced and the official result has been decided within 12 hours, the bet will stand. Otherwise your bet will be voided and your stake returned.
For example: You have bet on Manchester United to beat Watford. After 72 minutes the match is abandoned due to adverse weather with Manchester Utd leading 2-1. If the governing body decide the result will stand and the 2-1 result is finalised, the bet will also stand. If no decision is reached within this 12 hour time frame your bet will be void.
Should an event be postponed prior to the scheduled start time, your bet will be void if the event does not take place within 12 hours of the original start time and date. However, if the match is played within 12 hours of the intended start time all bets will stand.