Routing
Smart routing
Algorithmic selection of an acquirer or MID per transaction to maximise approval rate, minimise cost, or both.
Smart routing rules consider card BIN, issuer country, ticket size, time of day, MCC, and historical acquirer performance. Modern routers use machine-learning models that retrain on outcomes (approval, decline reason, fraud, chargeback) so routing improves continuously.
Related terms
A platform layer that lets a merchant connect to multiple acquirers, APMs, and risk tools through one integration and route transactions intelligently.
A unique identifier issued by an acquirer that ties transactions to a specific merchant account.
An authorisation response refusing to fund a transaction, returned by the issuer with a reason code.
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