> ## Documentation Index
> Fetch the complete documentation index at: https://docs.lead.bank/llms.txt
> Use this file to discover all available pages before exploring further.

# Overview

> Details on SFTP document delivery.

## Introduction

Throughout the API and File Delivery interfaces, you will see areas where Lead expects a **reference** to a Document you have collected as part of program operation. In each of these cases, Lead expects that a document is delivered into the `/documents` [SFTP directory](/file-integrations/sftp-setup); the *references* inform Lead of how to retrieve the underlying documents from our SFTP directory.

This page outlines how to reference documents in each interface that expects document references.

### Document Upload

#### SFTP

Documents that are referenced in Lead Interfaces should be uploaded via SFTP. To upload a document, upload a `PDF`, `JPG`, `JPEG`, `PNG`, or `HTML` file into the `/documents` directory of your SFTP Folder.

### Document References

#### Entity API

| Field                                                                                     | **Type** | **Required**                                                                                                                         | **Instruction**                                                                    |
| ----------------------------------------------------------------------------------------- | -------- | ------------------------------------------------------------------------------------------------------------------------------------ | ---------------------------------------------------------------------------------- |
| `individual_details.identification_details.identification_documents[].client_document_id` | String   | Optional - provided if a document upload rather than an approved eKYC workflow is used to support entity identification information. | Populate `client_document_id` with the filename of the file in the SFTP directory. |
| `individual_details.identification_details.additional_documents[].client_document_id`     | String   | Optional - provided if a document upload rather than an approved eKYC workflow is used to support entity identification information. | Populate `client_document_id` with the filename of the file in the SFTP directory. |
| `business_details.identification_details.identification_documents[].client_document_id`   | String   | Optional - provided if a document upload rather than an approved eKYC workflow is used to support entity identification information. | Populate `client_document_id` with the filename of the file in the SFTP directory. |
| `business_details.identification_details.additional_documents[].client_document_id`       | String   | Optional - provided if a document upload rather than an approved eKYC workflow is used to support entity identification information. | Populate `client_document_id` with the filename of the file in the SFTP directory. |

#### Customers File

| Field                                           | **Type** | **Required**                                                                                                                         | **Instruction**                                                                    |
| :---------------------------------------------- | :------- | :----------------------------------------------------------------------------------------------------------------------------------- | :--------------------------------------------------------------------------------- |
| `identification_documents[].client_document_id` | String   | Optional - provided if a document upload rather than an approved eKYC workflow is used to support entity identification information. | Populate `client_document_id` with the filename of the file in the SFTP directory. |
| `additional_documents[].client_document_id`     | String   | Optional - provided if a document upload rather than an approved eKYC workflow is used to support entity identification information. | Populate `client_document_id` with the filename of the file in the SFTP directory. |

#### Applications File

| Field       | **Type**  | **Required** | **Instruction**                                                                                                                                                                                                                                                           |
| :---------- | :-------- | :----------- | :------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ |
| `documents` | JSON List | Required     | Each object in the JSON should conform to the [Compliance Document Reference Schema](https://docs.lead.bank/file-integrations/documents/referencing-compliance-documents). For `document_id`, populate the File Name of the underlying file stored in the SFTP directory. |

#### Accounts File

| Field       | **Type**  | **Required** | **Instruction**                                                                                                                                                                                                                                                           |
| :---------- | :-------- | :----------- | :------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ |
| `documents` | JSON List | Required     | Each object in the JSON should conform to the [Compliance Document Reference Schema](https://docs.lead.bank/file-integrations/documents/referencing-compliance-documents). For `document_id`, populate the File Name of the underlying file stored in the SFTP directory. |