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

# IDocumentDeferredService

`IDocumentDeferredService` declares a service contract in the Documents 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 Documents area*.

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

## Public members
| Member | Signature | Purpose |
| --- | --- | --- |
| `AddressErrorMessage` | `string AddressErrorMessage(DocumentLabelData certifiedLabelData)` | Handles address error message, given `certifiedLabelData`*. |
| `GetCertifiedLabel` | `CertifiedLabelData GetCertifiedLabel(DocumentLabelData documentLabelData)` | Returns certified label, given `documentLabelData`*. |

> **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/Documents/IDocumentDeferredService.cs