What do you use instead of iban no?

Instead of an IBAN (International Bank Account Number), you can use a SWIFT/BIC code, which identifies a specific bank for international transactions. Additionally, you may provide a standard bank account number along with the bank's routing number, especially for domestic transfers. Some regions may also use alternative systems like ACH numbers in the U.S. or sort codes in the UK. Always verify which information is required based on the transaction type and destination country.