Full ISO 20022 Definition
Definition: Point to point reference, as assigned by the instructing party, and sent to the next party in the chain to
unambiguously identify the message. Usage: The instructing party has to make sure that MessageIdentification is unique per instructed party for
a pre-agreed period.
Data Type: Max35Text
Format: maxLength: 35 – minLength: 1
Source document: Message Definition Report – Payments – Maintenance 2009