Start with the tender requirement
Bond sourcing starts with the exact BDS/ITB and guarantee form. Permitted instrument, issuer type, currency, amount, governing rules, expiry, claim wording and any required confirmation or local issuance route are identified before providers are approached.
A domestic relationship bank may be the cheapest first issuer but still create an expensive final structure if a correspondent, counter-guarantor or local reissuing bank is required for beneficiary acceptance.
