generated: '2026-07-18'
method: searched
source: https://dddinvoices.com/documentation-e-invoicing
docs: https://dddinvoices.com/documentation-e-invoicing
test_live_separation:
  model: per-legal-entity connection keys
  test_key: TEST connection key (issued on sign-up)
  live_key: PROD connection key (returned after production switch)
  switch_operation: DDDI_ChangeModeToProd
  description: >-
    Each legal entity registered on the platform is issued a TEST connection key
    for sandbox integration. Calls run in test mode until the entity is switched
    to production via DDDI_ChangeModeToProd, which provisions the PROD key.
onboarding:
  free_testing: true
  steps:
  - Register as a service provider and sign up.
  - Create an API (connection) key for sandbox testing.
  - Integrate and test against the TEST connection key.
  - Switch the legal entity to production (DDDI_ChangeModeToProd) to go live.
  signup: https://app.dddinvoices.com/sign-up
notes: >-
  DDD Invoices does not publish static magic test identifiers (no test card /
  IBAN tables); the sandbox is the TEST connection-key mode against the live API
  surface. No fabricated test values are recorded here.