By default, Buttondown doesn't send payment receipts to your subscribers when they pay for a subscription. If you'd like your subscribers to receive receipts, you can enable Stripe's built-in receipt functionality.
Once enabled, Stripe will automatically send a receipt email to your subscribers whenever they make a payment (including both initial subscriptions and renewals).
You can customize what appears on your receipts in the same Stripe settings area. This includes:
For more details on customizing receipts, see Stripe's documentation on email receipts.