ediverse Explore the platform

Spotlight PEPPOL BIS Billing 3.0 The EU e-invoicing mandate is here — France Sept 2026, Belgium Jan 2026, Germany 2025.

— 01

Foundations

— 02

Standards

— 03

Flagship messages

— 04

Tools

MT tag 21R

On this page

SWIFT MT field Request Reference.

Definition

Tag 21R (Request Reference) is used in response messages to point to the original query. Present in MT 195/196/198/199 (Queries) and some 9xx (Cash Management). Format 16x.

Origin

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

Example in context

:21R:QRY-2026-007 — answer to query QRY-2026-007.