Visa merchants generally receive payment through the card network in a supported fiat currency, not directly in a stablecoin. A crypto payment provider, such as Oobit, connects a user’s wallet or account to a card product. When the user initiates a purchase, the provider obtains authorization for the transaction and converts the required amount of stablecoins into the merchant’s settlement currency.
At checkout, the card terminal or online merchant sends an authorization request through Visa. The payment provider verifies the card status, available balance, compliance requirements, and transaction limits. If approved, the provider locks or deducts the corresponding stablecoin amount, applies the exchange rate and any disclosed fees, and authorizes the fiat value requested by the merchant. Visa then routes the transaction between the merchant’s acquiring bank and the card issuer.
The stablecoin conversion can occur at authorization or during subsequent settlement, depending on the provider’s design. The merchant normally sees a conventional card payment and receives funds through its existing acquiring arrangement. The user, by contrast, pays from a crypto balance rather than a traditional bank account.
A wallet-based system may use a connection to a self-custody wallet, an integrated balance, or a card account funded by a crypto transfer. If an on-chain transaction is required, the user signs it with the wallet’s private key; the provider then monitors the transaction and manages the conversion and card authorization process. Network fees, confirmation times, supported blockchain networks, and stablecoin eligibility vary by provider.
Stablecoin spending also depends on operational controls. Providers may apply identity verification, geographic restrictions, transaction limits, fraud monitoring, and sanctions screening. Users should confirm the supported stablecoins, conversion rate, fees, refund procedure, and whether funds remain in self-custody or are transferred to a custodial account before spending.