Credit card companies also have this capability. Mine in particular sends an SMS with a confirmation link that requires a password for online transactions. But

Credit card companies also have this capability. Mine in particular sends an SMS with a confirmation link that requires a password for online transactions. But certain types of CC transactions, such as subscription charges, typically occur in the background, when the user may not be available. There aren't a lot of confirmation schemes in place for that, you'd need a plain manual transfer or "push" mode for subscriptions without a CC or bank account on record.