What is SEPA?

SEPA is the Single Euro Payments Area: a set of schemes for euro transfers across participating countries. SCT is a credit. SDD is a debit. SCT Inst is the instant credit. Identifiers are IBANs. The scheme is the rail. Your ledger is still the book for wallets and fees.

How does SEPA work?

You originate a credit or a debit under a scheme rulebook. Banks exchange ISO 20022 messages. SCT takes a banking day. SCT Inst posts in seconds when both banks support it. SDD pulls under a mandate and can be refunded for a long window on consumer accounts.

SEPA vs ACH

Same shape: batch credits and debits, plus an instant cousin. Different identifiers, different return rules, different currencies. Do not reuse an ACH return handler for SDD. The codes and the timelines differ.

What do you post?

A credit payout is wallet to euro clearing. A debit collection is clearing to wallet, held until you accept refund risk. Instant credits can commit when the scheme says accepted.

How it works with Blnk

Use a euro rail pot, such as @PayoutEUR_SEPA or @WorldEUR_SEPA. Hold SCT and SDD inflight. SCT Inst can commit on acceptance. Keep the IBAN and the scheme in metadata.

await blnk.Transactions.create({
  precise_amount: 25000,
  precision: 100,
  reference: 'sepa_out_20260816_001',
  currency: 'EUR',
  source: 'customer_wallet_id',
  destination: '@PayoutEUR_SEPA',
  description: 'SEPA credit transfer',
  inflight: true,
  meta_data: {
    rail: 'sepa',
    scheme: 'sct',
    iban: 'DE89370400440532013000',
    customer_id: 'cus_8f21a4',
  },
});