When speaking of the “user account”, it’s up to the client/customer if they decide to give this possibility to the user (add the functionality to the UI).
Fans United itself has the ability to delete only future predictions (those that have not been resolved yet).
For example, if the user makes a prediction about a match that is playing tomorrow, they have until the match starts to delete their prediction. If the match starts, they can no longer delete their prediction.
We do this, because since many of the games come with rankings and prizes, deleting past predictions can inflict changes to the ranking, possible prizes given away, etc.