The customer's DEFAULT saved card — its id (to charge) + its billing address (to locate tax). Graceful: a transient Stripe error returns null rather than blocking a top-up (this is only tax LOCATION / an off-session skip).
The customer's DEFAULT saved card — its id (to charge) + its billing address (to locate tax). Graceful: a transient Stripe error returns null rather than blocking a top-up (this is only tax LOCATION / an off-session skip).