What is an MT103, and how do you trace an international payment?
When an international payment goes missing, there is a document that shows every institution that touched it. Most people never learn it exists.
Each bank signed for it. The document is where you find out who has it now.
What the message contains
An MT103 is a structured instruction, and the fields are the useful part.
The sender and beneficiary details, including account identifiers. The amount and currency, both as sent and, where converted, as delivered. A unique reference for the transaction. The charge code, which is where OUR, BEN or SHA appears and tells you who was meant to absorb the fees. The value date, meaning when the funds were made available. And the chain of institutions, which is the field that answers where the payment actually is.
That last piece is why the document matters. An international payment is a relay, and each institution records its handling. The MT103 is the account of that relay.
How to use it when money is missing
Ask your bank for the MT103 or the SWIFT copy of the transfer. Banks provide this and routinely do not offer it unprompted, so the request has to be specific.
Read the value date and the charge code first. If the value date has passed and the recipient sees nothing, the payment is sitting somewhere in the chain, not lost. If the charge code is SHA or BEN and the recipient received a smaller amount, that is not a missing payment at all, and the article on charge codes explains where it went.
Then give the reference and the MT103 to the recipient, who gives it to their own bank. A receiving bank with the reference can locate an incoming payment that has arrived but not been credited, which is a common and easily resolved situation, usually caused by a mismatch between the beneficiary name and the account.
If it is genuinely stuck, your bank can raise a trace through the network, which asks each institution in the chain to report what it did. This takes time and it does resolve things.
What it does not do
It is not proof of receipt. It proves an instruction was sent and shows how it was handled, which is not the same as the beneficiary having the money.
It also cannot be used to recall a payment. Recalls are a separate request, and a payment that has been credited to the beneficiary can generally only be returned with their agreement. This matters because a common fraud involves persuading someone to send an international payment and then relying on how hard reversal is.
And the format itself has already gone. SWIFT ended the MT and ISO 20022 coexistence period on 22 November 2025, formally retiring MT103 and MT202 as cross-border payment instructions in favour of their ISO 20022 equivalents. Contingency translation exists and has been chargeable since January 2026, so stragglers still send MT and have it converted, but the instruction you send today is almost certainly a pacs.008.
The word survives anyway. Banks still say "MT103" when they mean proof of payment, and the document they hand you carries the same fields under a new format. Ask for it by that name and you will get the right thing.
A relay baton with a signature sheet attached. Each runner signs when they take it. If it never reaches the finish, you do not search the whole track. You read the sheet, find the last signature, and go and ask that runner.
Where you meet it
Every international transfer that arrived late, short, or not at all. Every supplier asking for proof of payment. Every bank that provided the document immediately once asked and never mentioned it beforehand.