---
title: "Upload Additional Document (Public)"
method: POST
path: "/api/public/intake/additional-documents"
tags: ["Public Intake Requests"]
---

# Upload Additional Document (Public)

`POST /api/public/intake/additional-documents`

## Request

- Base URL: `https://api.signalshq.io` (the document declares no server; this is the origin it was published from)
- URL: `https://api.signalshq.io/api/public/intake/additional-documents`
- Auth: none declared. Required headers: `X-Intake-Token`

Upload an additional document not in the original request. Uses X-Intake-Token header. No authentication required.

## Headers

- `X-Intake-Token` string, required: Secure intake token for document upload request

## Request body `multipart/form-data`

- BodyUploadAdditionalDocumentApiPublicIntakeAdditionalDocumentsPost
  - `file` string, binary, required: Document file to upload
  - `document_type` 'W2' | 'W2_AS' | 'W2_CM' | 'W2_GU' | 'W2_VI' | 'FORM_W2G' | 'FORM_W3' | 'FORM_1040' | 'FORM_1040_SCHEDULE_A' | 'FORM_1040_SCHEDULE_B' | 'FORM_1040_SCHEDULE_E' | 'FORM_1040_SCHEDULE_F' | 'FORM_1040_SENIOR' | 'FORM_1098' | 'FORM_1098_C' | 'FORM_1098_E' | 'FORM_1098_T' | 'FORM_1099_INT' | 'FORM_1099_A' | 'FORM_1099_B' | 'FORM_1099_CAP' | 'FORM_1099_CONSOLIDATED_STATEMENT' | 'FORM_1099_DIV' | 'FORM_1099_R' | 'FORM_1099_G' | 'FORM_1099_MISC' | 'FORM_1099_NEC' | 'FORM_1099_C' | 'FORM_1099_K' | 'FORM_1099_LTC' | 'FORM_1099_OID' | 'FORM_1099_PATR' | 'FORM_1099_QA' | 'FORM_1099_SA' | 'FORM_1099_Q' | 'FORM_1099_DA' | 'FORM_RRB_1099' | 'FORM_RRB_1099R' | 'FORM_1099_S' | 'FORM_1042_S' | 'FORM_8805' | 'FORM_8288_A' | 'FORM_1095_A' | 'FORM_1095_C' | 'FORM_SSA_1099' | 'FORM_2439' | 'FORM_3921' | 'FORM_3922' | 'FORM_5498' | 'FORM_5498_SA' | 'SCHEDULE_K1_GENERIC' | 'SCH_K1_1041' | 'SCH_K1_1065' | 'SCH_K1_1120S' | 'FORM_1041_SCHEDULE_K1' | 'FORM_1065_SCHEDULE_K1' | 'FORM_1120S_SCHEDULE_K1' | 'INVOICE' | 'RECEIPT' | 'TAX_FORM' | 'PROFIT_AND_LOSS_STATEMENT' | 'PROFIT_AND_LOSS_STATEMENT_BUSINESS' | 'PROFIT_AND_LOSS_STATEMENT_FARM' | 'PROFIT_AND_LOSS_STATEMENT_RENTAL' | 'INCOME_STATEMENT' | 'GENERAL_LEDGER' | 'TRIAL_BALANCE' | 'BALANCE_SHEET' | 'SCHEDULE_C_INPUT' | 'PREVIOUS_YEAR_RETURN' | 'BROKERAGE_STATEMENT' | 'ASSETS_PURCHASED_BUSINESS' | 'ASSETS_SOLD_BUSINESS' | 'ASSETS_PURCHASED_RENTAL' | 'ASSETS_SOLD_RENTAL' | 'ASSETS_PURCHASED_FARM' | 'ASSETS_SOLD_FARM' | 'MEDICAL_EXPENSES' | 'CHARITABLE_CONTRIBUTIONS_CASH' | 'CHARITABLE_CONTRIBUTIONS_NON_CASH' | 'PERSONAL_PROPERTY_TAXES' | 'SALES_AND_USE_TAXES' | 'VEHICLE_EXPENSES' | 'DAY_CARE_EXPENSES' | 'MAJOR_PURCHASES' | 'PROPERTY_TAX_STATEMENT' | 'ESTIMATED_TAX_PAYMENT_RECEIPTS' | 'CLOSING_STATEMENT_REAL_ESTATE' | 'PREVIOUS_YEAR_TAX_RETURNS' | 'TAX_RETURN' | 'TAX_ORGANIZER' | 'TAX_PLANNING' | 'REPAIRS_AND_IMPROVEMENTS_RENTAL' | 'PAYROLL_TAX_REPORT' | 'CLIENT_INTAKE_FORM' | 'GOVERNMENT_ISSUED_IDENTIFICATION' | 'IRS_NOTICE_OR_LETTER' | 'DEPENDENT_DOCUMENTATION' | 'FOREIGN_FINANCIAL_ACCOUNTS' | 'FOREIGN_INCOME_DOCUMENTATION' | '529_PLAN_STATEMENT' | '83B_ELECTION_STATEMENT' | 'SALES_BY_STATE_REPORT' | 'STATES_FILING_SALES_TAX_RETURNS' | 'VEHICLE_SELLER_REPORT' | 'HEALTH_INSURANCE_PREMIUM_STATEMENT' | 'BIRTH_CERTIFICATE' | 'DRIVERS_LICENSE' | 'DIRECT_DEPOSIT' | 'REGISTRATION_RENEWAL_NOTICE' | 'ENGAGEMENT_LETTER' | 'SERVICE_AGREEMENT' | 'CLIENT_NOTE' | 'BUNDLED_DOCUMENT' | 'OTHER_DOCUMENTS' | 'UNCATEGORIZED' | 'VESTING_STATEMENT' | 'EXERCISE_CONFIRMATION' | 'CLERGY_INFORMATION' | 'OTHER', required
  - `description` string, nullable: Description of the additional document
  - `client_notes` string, nullable: Optional notes from the client about this document

## Response `201`

Successful Response

- PublicDocumentUploadResponse: Schema for successful public document upload
  - `success` boolean: Whether the upload was successful
  - `message` string, required: Success message
  - `item_id` string, uuid, required: ID of the request item that was uploaded
  - `document_id` string, uuid, required: ID of the uploaded document
  - `document_name` string, required: Name of the uploaded document
  - `file_size` integer, required: Size of the uploaded file in bytes
  - `uploaded_at` string, date-time, required: When the document was uploaded
  - `request_info` UploadRequestInfo, required: Schema for upload request information
    - `request_title` string, required: Title of the upload request
    - `completed_items` integer, required: Number of completed items
    - `total_items` integer, required: Total number of items (excluding voluntary documents)
    - `remaining_items` integer, required: Number of remaining items to upload
    - `uploaded_items` integer, required: Number of uploaded items (alias for completed_items, kept for backward compatibility)
    - `status` string, required: Status of the upload request
    - `can_submit` boolean, required: Whether the request can be submitted

## Other responses

- `422`: Validation Error

---

[API](https://skmtc.dev/signalshq/apis/signals-api.md) - [All operations](https://skmtc.dev/signalshq/apis/signals-api/llms.txt) - [OpenAPI document](https://skmtc.dev/signalshq/apis/signals-api/revisions/2c22af3b5576?raw)