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

# IBillServiceHelper

`IBillServiceHelper` declares a service contract in the Legal / Bills area, implemented outside this library (most likely in SAIF.Services, per the declare-here, enforce-elsewhere pattern documented for this library)*.

## Purpose
- Declares the operations that a SAIF.Services implementation must provide for the Legal / Bills area*.

## Context
- Namespace: `SAIF.Core.Contracts.Legal.Bills`
- Kind: Interface
- Assembly/package: `SAIF.Core` (NuGet package `SAIF.SAIFCode.Core`)

## Public members
| Member | Signature | Purpose |
| --- | --- | --- |
| `GetNextIssueDate` | `DateTime GetNextIssueDate(string code)` | Returns next issue date, given `code`*. |
| `IsValidReceivedDate` | `bool IsValidReceivedDate(long caseId, DateTime workDate)` | Indicates whether valid received date applies to this IBillServiceHelper*. |
| `IsValidServiceThruDate` | `bool IsValidServiceThruDate(DateTime fromDate, DateTime? thruDate, bool isPrepayment)` | Indicates whether valid service thru date applies to this IBillServiceHelper*. |
| `GetBillNotes` | `IList<LegalNote> GetBillNotes(long caseId)` | Returns bill notes, given `caseId`*. |
| `LogError` | `void LogError(ClientException data)` | Logs error, given `data`*. |

> **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
- Core/SAIF.Core/Contracts/Legal/Bills/IBillServiceHelper.cs