The MT 103 message can be exchanged in three different ways, depending on the business scenario in which the message is used.
The core MT 103 is a General Use message, ie, no registration in a Message User Group (MUG) is necessary to send and receive this message. It allows the exchange of single customer credit transfers using all MT 103 fields, except field 77T (Envelope Contents).
The MT 103 + is a General Use message, ie, no registration in a Message User Group is necessary to send and receive this message. It allows the exchange of single customer credit transfers using a restricted set of fields and format options of the MT 103 to make it straight through processable. The MT 103 + is a compatible subset of the core MT 103 and is documented separately after the MT103.
The MT 103 Extended Remittance Information MUG allows its subscribers to exchange MT 103 messages with field 77T containing an extended amount of remittance information. This remittance information may optionally be exchanged in a non-SWIFT format, such as EDIFACT or ANSI-X12.
Senders and Receivers who wish to use the MT 103 for the exchange of extended remittance data (up to 9,000 characters) will have to register for the Extended Remittance Information MUG.