UK betting operator Ladbrokes is bracing for an arbitrator’s verdict on whether or not the bookie’s software was mishandling punters’ attempts to place wagers.

On Wednesday, the Guardian reported that the Independent Betting Adjudication Service (IBAS), the UK’s primary Alternative Dispute Resolution (ADR) service, was considering three near-identical complaints regarding online bets that GVC Holdings’ Ladbrokes brand declined but which punters claim were actually cancelled.

The disputes all center around racing wagers that were declined, but all three punters claim to have received an official ‘bet number,’ which suggests the bets were actually accepted. Moreover, despite the post-race realization that the wagers had been declined, the punters claim their wagers were graded as ‘cancelled,’ prompting more confusion as to whether or not the bets may have been accepted at some point before being declined.

The three wagers were individually placed over a period of several months, which, if the IBAS determines there’s some glitch in Ladbrokes’ software, opens up the possibility that there are many more such cases that have so far gone unreported. IBAS has offered no indication when it might issue a ruling on the matter.