This is an event.
Channel: uk/nhs/notify/supplierapi/letter/printed/v1
Content Type: application/cloudevents+json
Event Type: Published
Data Schema Reference: /schemas/digital-letters/2025-10-draft/data/digital-letter-base-data.schema.json
Schema Reference: /schemas/digital-letters/2025-10-draft/events/uk.nhs.notify.supplierapi.letter.printed.v1.schema.json