Payments Training Hub

MT103 Optional Fields Deep Dive

D04 Messaging and standards · 7 lessons

Version 1.0 | Last reviewed 2026-11-05

Learner explains the optional MT103 fields 52a, 57a, 53B, 70 and 71G, and shows how each one changes routing, charges and remittance information. Learner uses real examples with amounts, banks and message names to show how the topic works in practice.

MT103 optional fields in depth: 52a, 57a, 53B, 70 and 71G, the fields that change everything.

What You Can Do After This Chapter

Learning objective. Learner explains the optional MT103 fields 52a, 57a, 53B, 70 and 71G, and shows how each one changes routing, charges and remittance information. Learner uses real examples with amounts, banks and message names to show how the topic works in practice.

Practical assessment. Learner receives a payment case for a 75,000 dollar supplier payment with an intermediary bank, charges and a remittance reference, then drafts a complete MT103 using optional fields 52a, 57a, 53B, 70 and 71G, and explains the effect of each field on routing and charges. Learner submits all work with sources, calculations and assumptions stated clearly, and reviews the result against the chapter checklist before submission.

Expected deliverables.

Completion criterion. Learner drafts a complete and correct MT103 with all five optional fields used properly, and explains routing, charges and remittance effects accurately. Completion is judged on accuracy, completeness and clear written explanation throughout.

In this chapter
  1. A Basic MT103 Decrypted: Mandatory Fields Only
  2. Field 52a Ordering Institution: When and Why It Appears
  3. Field 57a Account With Institution: When and Why It Appears
  4. How 52a and 57a Change Across the Serial Chain
  5. Field 53B Sender's Correspondent and How Cover Differs
  6. Field 70 Remittance Information and Field 71G Receiver's Charges
  7. Worked Example: the full USD 367,574.90 payment from BNP Paribas Paris (BNPAFRPP) to Banco Santander Madrid (BSCHESMM) via Wells Fargo (PNBPUS3N, USD 20 charge) and Bank of New York Mellon (IRVTUS3N, USD 22 charge), reference 103REF405775, charges SHA, beneficiary account ES6300491800132710387658, final settled USD 367,532.90, with every optional field explained as it appears and disappears across the three MT103s

Start Lesson 1: A Basic MT103 Decrypted: Mandatory Fields Only →