> ## Documentation Index > Fetch the complete documentation index at: https://docs.capa.fi/llms.txt > Use this file to discover all available pages before exploring further. # Request Signature Initiates the document signing process for a user. Returns a URL where the user can sign required agreements for a specific country. *** ## Important Notes * Only `INDIVIDUAL` users can request document signatures. * The user must be KYC-verified before requesting signatures. * Users who have already signed documents cannot sign again. *** ## Error Codes ### Common Errors | HTTP Status | Code | Message | | ----------- | ---------------------- | ---------------------------------- | | 401 | `UNAUTHORIZED` | "API Key is missing" | | 401 | `UNAUTHORIZED` | "Invalid API Key format" | | 401 | `UNAUTHORIZED` | "Invalid API Key" | | 403 | `INVALID_PARTNER_FLOW` | "The partner has an invalid flow." | ### User Ownership Errors | HTTP Status | Code | Message | | ----------- | -------------- | ---------------------------------------------------- | | 401 | `UNAUTHORIZED` | "Partner information is required for this operation" | | 401 | `UNAUTHORIZED` | "User is not associated with the partner" | ### Endpoint-Specific Errors | HTTP Status | Code | Message | | ----------- | -------------------------- | ---------------------------------------------------------------- | | 400 | `INVALID_USER_INPUT_ERROR` | "Invalid User Input" | | 400 | `BAD_REQUEST` | "Country not supported" | | 400 | `BAD_REQUEST` | "User must be of type INDIVIDUAL to request document signatures" | | 400 | `BAD_REQUEST` | "User already has signed documents" | | 400 | `USER_NOT_VERIFIED_ERROR` | "User identity verification not verified" | | 400 | `BAD_REQUEST` | "User authentication method is not email" | | 400 | `BAD_REQUEST` | "User identity verification missing name" | | 404 | `NOT_FOUND_ERROR` | "Failed to find user identity verification" | | 404 | `NOT_FOUND_ERROR` | "No active templates found" | | 404 | `NOT_FOUND_ERROR` | "Requested User was not found" | | 500 | `INTERNAL_SERVER_ERROR` | "Document signature provider failure" | ## OpenAPI ````yaml reference/openapi/UserPartnerControllerV2_requestDocumentSignature.json POST /api/partner/v2/users/{userId}/documents/sign openapi: 3.0.0 info: title: Capa Partner API - V2 description: >- Partner API for integrating cryptocurrency on-ramp and off-ramp services using Capa's infrastructure. Enable your users to seamlessly convert between fiat and crypto. version: v2 contact: {} servers: - url: https://staging-api.capa.fi - url: https://production-api.capa.fi security: [] paths: /api/partner/v2/users/{userId}/documents/sign: post: tags: - users operationId: UserPartnerControllerV2_requestDocumentSignature parameters: - name: userId required: true in: path description: The user ID schema: type: string requestBody: required: true content: application/json: schema: type: object properties: country: description: >- The country code for the document signature request @description The country must be a valid ISO 3166-1 alpha-2 country code, see: @link https://en.wikipedia.org/wiki/ISO_3166-1_alpha-2 example: MX enum: - MX - DO - US - AT - BE - BG - HR - CY - CZ - DK - EE - FI - FR - DE - GR - HU - IE - IT - LV - LT - LU - MT - NL - PL - PT - RO - SK - SI - ES - SE - IS - LI - 'NO' - CH - GB - MC - SM - AD - VA type: string required: - country x-readme-ref-name: RequestDocumentSignatureBody responses: '201': description: >- Document signature request created successfully. Returns the signature request details. content: application/json: schema: type: object properties: success: type: boolean example: true data: type: object properties: url: type: string description: The URL of the document signature request. required: - url x-readme-ref-name: RequestDocumentSignatureResponse example: success: true data: url: string '400': description: Bad Request content: application/json: schema: $ref: '#/components/schemas/ErrorResponse' examples: INVALID_USER_INPUT_ERROR: value: success: false code: INVALID_USER_INPUT_ERROR message: Invalid User Input BAD_REQUEST: value: success: false code: BAD_REQUEST message: Country not supported for document signatures BAD_REQUEST_2: value: success: false code: BAD_REQUEST message: User identity verification missing {field} '401': description: Unauthorized content: application/json: schema: $ref: '#/components/schemas/ErrorResponse' examples: UNAUTHORIZED: value: success: false code: UNAUTHORIZED message: API Key is missing UNAUTHORIZED_2: value: success: false code: UNAUTHORIZED message: Invalid API Key format UNAUTHORIZED_3: value: success: false code: UNAUTHORIZED message: Invalid API Key UNAUTHORIZED_4: value: success: false code: UNAUTHORIZED message: Partner information is required for this operation UNAUTHORIZED_5: value: success: false code: UNAUTHORIZED message: User is not associated with the partner '403': description: Forbidden content: application/json: schema: $ref: '#/components/schemas/ErrorResponse' example: success: false code: USER_NOT_VERIFIED_ERROR message: User identity verification not verified '404': description: Not Found content: application/json: schema: $ref: '#/components/schemas/ErrorResponse' examples: NOT_FOUND_ERROR: value: success: false code: NOT_FOUND_ERROR message: Requested resource was not found NOT_FOUND_ERROR_2: value: success: false code: NOT_FOUND_ERROR message: Failed to find user identity verification '409': description: Conflict content: application/json: schema: $ref: '#/components/schemas/ErrorResponse' example: success: false code: BAD_REQUEST message: User has already signed documents '500': description: Internal Server Error content: application/json: schema: $ref: '#/components/schemas/ErrorResponse' example: success: false code: INTERNAL_SERVER_ERROR message: Internal server error security: - PartnerApiKey: [] components: schemas: ErrorResponse: type: object properties: success: type: boolean example: false code: type: string description: Machine-readable error code. message: type: string description: Human-readable error message. errors: type: array description: Optional per-field validation details. items: type: object properties: field: type: string message: type: string required: - success - code - message securitySchemes: PartnerApiKey: type: apiKey in: header name: partner-api-key description: API key for the affiliated partner performing the request. ````