Struct MT199 

pub struct MT199 {
    pub field_20: Field20,
    pub field_21: Option<Field21NoOption>,
    pub field_79: Field79,
}

MT199: Free Format Message

Purpose

Used for free format communication between financial institutions regarding customer payments and related matters. This message provides the maximum flexibility for various types of communication that don’t fit into other structured message formats, enabling efficient bilateral communication in the payment ecosystem.

Scope

This message is:

• Used for customer payment-related communications between financial institutions
• Applicable for inquiries, clarifications, and general information exchange
• Designed for flexible narrative text supporting various communication needs
• Compatible with both automated and manual message generation systems
• Subject to minimal validation rules for maximum communication flexibility
• Integrated with customer service and payment processing communication workflows

Key Features

• Maximum Communication Flexibility: Field 79 for completely free format narrative text
• Payment Context Integration: Specifically related to customer payments and transactions
• Bilateral Communication Support: Facilitates direct bank-to-bank communication
• Reference Tracking System: Links to related payment messages or transactions
• Minimal Structure Requirements: Minimal mandatory fields for maximum messaging flexibility
• Multi-Purpose Usage: Adaptable to various communication scenarios and business needs

Common Use Cases

• Payment inquiry messages for transaction status and details
• Status update communications for processing milestones
• Clarification requests for payment instructions and requirements
• Special instruction messages for unique processing needs
• Problem resolution communications for payment issues
• Customer service related messages for account and payment support
• Reject and return notifications with detailed explanatory information

Message Structure

• Field 20: Sender’s Reference (mandatory) - Unique message reference identifier
• Field 21: Related Reference (optional) - Reference to related message or transaction
• Field 79: Narrative (mandatory) - Free format text content for communication

Network Validation Rules

• Reference Format Validation: Sender’s reference must follow standard SWIFT reference format rules
• Narrative Content Requirements: Field 79 must contain meaningful communication content
• Related Reference Format: Field 21 must follow proper reference format when present
• Reject/Return Guidelines: If narrative starts with /REJT/ or /RETN/, must follow Payments Guidelines
• Content Length Validation: Narrative content must be within specified field length limits
• Character Set Compliance: All text content must use valid SWIFT character sets
• Mandatory Field Validation: All mandatory fields must be present with valid content

SRG2025 Status

• Structural Changes: None - MT199 format remains stable for free format communication
• Validation Updates: Enhanced validation for reject/return guidelines compliance
• Processing Improvements: Improved handling of structured reject and return notifications
• Compliance Notes: Maintained flexibility while ensuring compliance with payment guidelines

Integration Considerations

• Banking Systems: Compatible with customer service systems and payment communication platforms
• API Integration: RESTful API support for modern digital banking communication systems
• Processing Requirements: Supports both automated and manual message generation and processing
• Compliance Integration: Built-in validation for regulatory communication requirements

Relationship to Other Messages

• Triggers: Triggered by various payment scenarios requiring flexible communication
• Responses: May generate response messages or trigger follow-up communications
• Related: Works with all payment message types for supporting communication
• Alternatives: Structured messages for specific communication scenarios with defined formats
• Status Updates: Provides flexible status updates and notifications for payment processes

Fields

field_20: Field20

field_21: Option<Field21NoOption>

field_79: Field79

Implementations

impl MT199

pub fn validate() -> &'static str

Get validation rules for this message type

Trait Implementations

impl Clone for MT199

fn clone(&self) -> MT199

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for MT199

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for MT199

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl PartialEq for MT199

fn eq(&self, other: &MT199) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Serialize for MT199

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl SwiftMessageBody for MT199

fn message_type() -> &'static str

Get the message type identifier (e.g., “103”, “202”)

fn from_fields( fields: HashMap<String, Vec<(String, usize)>>, ) -> SwiftResult<Self>

Create from field map with sequential consumption tracking

fn from_fields_with_config( fields: HashMap<String, Vec<(String, usize)>>, config: &ParserConfig, ) -> Result<ParseResult<Self>, ParseError>

Create from field map with configuration for error collection

fn to_fields(&self) -> HashMap<String, Vec<String>>

Convert to field map

fn required_fields() -> Vec<&'static str>

Get required field tags for this message type

fn optional_fields() -> Vec<&'static str>

Get optional field tags for this message type

fn to_ordered_fields(&self) -> Vec<(String, String)>

Convert to ordered field list for MT serialization Returns fields in the correct sequence order for multi-sequence messages

impl StructuralPartialEq for MT199