Pre arbitration, often shortened to pre arb, is the step in a card dispute that follows representment. After a merchant re presents evidence and wins back a chargeback, the issuer can return a second time with a pre arbitration case, challenging that evidence before the dispute escalates to formal arbitration, where the card network rules and charges fees.
Why it matters
Pre arbitration is where a lot of high risk disputes are actually decided, because it is the last point to settle before the expensive, binding arbitration stage. Accepting a pre arb means eating the loss; fighting it and losing at arbitration adds network fees on top of the transaction. The decision is pure economics: the value of the sale against the arbitration filing fee and the odds your evidence holds. Merchants who track win rates by reason code know which pre arb cases to defend and which to concede, and that discipline keeps arbitration costs and the underlying chargeback ratio under control.