SWIFT ISO 15022 - Code OPNM Significations Option Number Rejection: Unrecognised option number. Unrecognised Option Number: Unrecognised option number. Utilisations Type de message Numéro de champ Tag MT549 (Request for Statement/Status Advice) 17 24B (Reason) MT567 (Corporate Action Status and Processing Advice) 13 24B (Reason Code)