SWIFT ISO 15022 - Code MATN Meaning Not Allowed: Maturity date modification is not allowed. Usages Message type Field number Tag MT540 (Receive Free) 55 22F (Indicator) MT541 (Receive Against Payment) 55 22F (Indicator) MT542 (Deliver Free) 55 22F (Indicator) MT543 (Deliver Against Payment) 55 22F (Indicator) MT578 (Settlement Allegement) 49 22F (Indicator) MT586 (Statement of Settlement Allegements) 57 22F (Indicator)