When cancelling a subscription, Orb now supports an effective date in the past, automatically handling the invoicing implications of this action including voiding and re-issuing invoices as required as well as handling the proration effects of the action.

This new functionality is helpful to handle scenarios in which the first payment for a subscription fails, and the subscription should be retroactively cancelled as of its start date. In these cases, we suggest programmatically cancelling the subscription as of the billing period start date. 

Read the docs to learn more about the different cancellation behaviors.