Generates a customer account statement aggregated from payment transactions (not invoices directly) for a given customer or organization. Despite the name, this is a multi-mode endpoint: type: JSON returns the data inline, type: PDF synchronously renders and returns a PDF, and type: SEND synchronously renders and emails it — all three run fully in-request with no job queue, so large date ranges can be slow.

Fields are accepted interchangeably from the request body, query string, or path — the body is canonical.