What is a Dunning Automation?

Failed payments happen constantly for reasons that have nothing to do with a customer wanting to cancel — an expired card, a bank declining an unfamiliar charge, insufficient funds that clear a day later. Dunning automation's core job is retrying the charge on a schedule informed by data about when retries actually succeed, while simultaneously notifying the customer so they can update their payment method themselves. A well-tuned dunning sequence balances recovery against annoyance: too few touchpoints and recoverable revenue is lost silently; too many and customers feel harassed into churning even though they intended to stay. Sophisticated systems personalize the sequence by risk segment and payment failure reason, and stop escalating the moment a payment succeeds mid-sequence. Because dunning sits directly on the billing ledger, it has to be idempotent — a retry must never double-charge a customer, and every attempt needs to be logged for reconciliation.