MT-TAG-21

SWIFT MT field Related Reference.

Definition

Tag 21 (Related Reference) correlates an MT 202 to an underlying MT 103, or points to a prior transaction in a payment chain. Format 16x. If no reference, value 'NONREF'.

Origin

Defined in the SWIFT Standards MT User Handbook, maintained by SWIFT SC in Brussels with annual update (November release).

Example in context

:21:TXN20260514001 — reference to transaction TXN20260514001.

Related terms

• MT 202 — message using 21.