---
title: LegalBillServiceValidator
summary: API reference for LegalBillServiceValidator.
status: draft
owner: SAIF Doc Gen
last_reviewed: 2026-09-24
library: SAIF.Services
reference_type: package
---

# LegalBillServiceValidator

FluentValidation validator for `LegalBillService` line items, enforcing that billed amount and billed units are positive, paid amount is non-negative and does not exceed the billed amount, and that the service's `BillServiceCode` passes the nested `BillServiceValidator` (non-empty code).

## Purpose
- Rejects a bill service line with a zero or negative billed amount or billed units.
- Rejects a negative paid amount or a paid amount greater than the billed amount.
- Delegates bill-service-code validation to `BillServiceValidator`, requiring a non-empty code.

## Context
- Namespace: `SAIF.Services.Legal.Bills`
- Assembly/package: `SAIF.Services` (packaged inside the `SAIF.SAIFCode.Core` NuGet package).

## Public members
| Member | Signature | Purpose |
| --- | --- | --- |
| LegalBillServiceValidator (constructor) | `public LegalBillServiceValidator()` | Configures the FluentValidation rules for `BilledAmount`, `BilledUnits`, `PaidAmount`, and the nested `BillService` code validator. |

## Behavioral notes
- `PaidAmount` validation is two rules: it must be `>= 0` and it must be `<=` `BilledAmount`, each with a distinct error message.
- The `BillService` property is validated by composing a separate `BillServiceValidator` instance rather than inline rules.

## Constraints and usage notes
- Carries a `CA1710:IdentifiersShouldHaveCorrectSuffix` suppression, since FluentValidation's naming convention ("Validator") does not match the `IValidator` interface-suffix rule.*

> **Note:** Statements marked with * were inferred from code structure, naming conventions, or
> contextual evidence where direct confirmation was not available in source artifacts. Statements
> marked with ** could not be confirmed; treat as unknown until verified.

## Sources
- `Services/SAIF.Services/Legal/Bills/LegalBillServiceValidator.cs`