[wise-go API docs study]: A BLOCKED notice means this quote must not back a transfer; check quote.Notices after CreateQuote and refuse to proceed on BLOCKED before calling CreateTransfer. Related Wise integration facts from the same study: the V1 sandbox URL (api.sandbox.transferwise.tech) was deprecated June 30 2026, use api.wise-sandbox.com; 429 responses carry Retry-After plus an X-Rate-Limited-By header, so back off per the header rather than fixed sleeps.

Context: A Wise Platform quote comes back with a BLOCKED notice in its notices array. Using it to create a transfer fails or produces a bad transfer.