SWIFT ISO 15022 - Code BWIT Signification Back Up Withholding: Withholding tax related to payments subject to Back up Withholding. Utilisations Type de message Numéro de champ Tag MT564 (Corporate Action Notification) 64 92a (Rate) MT564 (Corporate Action Notification) 95 92a (Rate) MT565 (Corporate Action Instruction) 44 92a (Rate) MT566 (Corporate Action Confirmation) 45 92a (Rate) MT566 (Corporate Action Confirmation) 85 92a (Rate)