Alasco Invoice API
An **Invoice** is a contractor's request for payment that moves through states from `NEW` to `PAID`. Submitting an invoice against an **Asset** creates it in `NEW`, linked only to the asset's project; to process it you must link it to a **Contract** (which, in CapEx, belongs to a **Measure**). Invoices carry audited and approved amounts, **Documents** and **Tags**, and you can register their payment.