Use this endpoint to pre-register a SEPA Direct Debit mandate:

• Electronic‑signature flow:

  • Upon registration, the mandate enters a PENDING state.
  • You must complete the signature via the Generate an Electronic Signature of a Document call.
  • Once signed, the mandate status updates automatically.

• Opt‑in signature flow:

  • Mandates registered with opt‑in are automatically validated.
  • Contact Lemonway Support to activate this option.

Important: Whenever you see accountId in a path or body parameter, enter your wallet’s ID.