Interac functions as the de facto national debit and instant-retail utility
Interac Debit is the only card-present debit scheme of scale and is accepted at essentially every Canadian POS; Interac e-Transfer does the work that would elsewhere sit on an instant-payments rail and cleared roughly 1.6 billion transactions in 2025. Dependence on a single private-sector network has been flagged by the Competition Bureau and Bank of Canada oversight, but no structural unbundling is in motion ahead of the RTR's phased launch.
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