A first-half bet when the game is abandoned at half-time

A completed first half settles the first-half market, and it normally stands even where the abandonment voids every full-game bet on the same match.

Each market carries its own completion test and the tests are independent. A full-game market asks whether the match reached whatever the operator calls official; a first-half market asks only whether the first half finished.

Operators are not unanimous and a few void everything on an abandoned match. That is a term in their rules rather than a different reading of the same one.

Which is where it goes wrong. A single slip can carry one settled leg and one voided leg on the same abandoned match, and nothing on the slip says in advance that it might.

What to do with it. On a match with weather or crowd risk, check whether your operator settles completed periods or voids the lot. Both rules exist and both are published.