Field L1-1RequiredIdentification Fields

    Metro 2 Field L1-1: L1 Segment Identifier

    Constant value identifying the appended segment as an L1 (Account Number / Identification Number Change). Reports a change to the consumer account number or identification number so the bureau preserves history under the new value.

    Quick Reference

    Field Number:L1-1
    Position:1-2
    Length:2 characters
    Type:alphanumeric
    Record:L1 Segment
    Required:Yes

    Allowed Values

    ValueMeaning
    L1L1 segment identifier

    Validation Rules

    • Must contain the literal value L1
    • Use only when an identifier actually changed

    Examples

    L1

    Common Errors

    • L1 sent every cycle even when nothing changed

    Tips & Best Practices

    • Send L1 once, in the cycle the identifier changes — then report the new value normally

    Related Fields

    L1-2
    L1 Change Indicator
    Single-character code stating what changed: the consumer acc...
    L1-3
    L1 New Consumer Account Number
    The new consumer account number when the account number has ...

    Other Identification Fields

    1Record Descriptor Word2Processing Indicator4Consumer Account Number3Identification NumberH-2Record Identifier (Header)H-3Cycle Identifier

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    L1 Segment Identifier - Metro 2 Field L1-1