okay

[crisp geyser]

Hi, I think what you're looking for is documented here: https://stripe.com/docs/billing/subscriptions/overview. It covers how subscriptions work and this document on subscription webhook events: https://stripe.com/docs/billing/subscriptions/webhooks.

Specifically, this section https://stripe.com/docs/billing/subscriptions/overview#unpaid-subscriptions on your first question.

If you leave the unpaid subscription in place, the most recent unpaid invoice remains open, new invoices are generated, and payments on new invoices are attempted. Use this behavior if you want to continue attempts to bill your customers every month, even when previous invoice payments have failed.

To test these, you can use our Test clocks: https://stripe.com/docs/billing/testing/test-clocks. This allows you to create a subscription in the past and advance time as necessary.