ReferenceIncidentsEra 3 · Series ADouble chargeThe Payment Provider slowed. Charges timed out and were retried, and some charged twice.What happens#The Payment Provider slowed. Charges timed out and were retried, and some charged twice.How to prevent it#Idempotency keys. Stop retries on the charge Link to end it.The postmortem opens the first of these that you do not own yet:Idempotency keysEngineering terms#At-least-once deliveryIdempotencyRetry with backoff and jitterTimeout