What period does the invoice cover? December 20, 2024 15:59 The invoice covers a 12-month cycle, as Alvéole is transitioning from a calendar year model to a 12-month cycle. As new contracts are established, the new timelines will take effect. Related articles What do Alvéole workshops look like? How can I contact someone about my service? What response time can I expect for my conversations with the accounting team?