What is international remittance code?

It appears to be part of a scam. International remittances are made by banks to banks or by individuals or corporations (or other legal entities) to foreign individuals or legal entities. These are checks usually in the currency of the originating entity. The payee's bank then finds the currency exchange value and, after deducting a fee of its own, deposits the remainder in the customer's account in the local currency.

There may be situations in which a code may be required, but check with your local bank if someone is asking for money for a code.