> ## Documentation Index > Fetch the complete documentation index at: https://developer.fin.com/llms.txt > Use this file to discover all available pages before exploring further. # Update Customer > Submit an RFI response for an individual or business customer. You must pass only the fields and documents specified in the RFI — submitting data that was not requested will trigger an error. Only submit the fields explicitly listed in the RFI. Sending unrequested fields will result in an error. The request body accepts the same fields as the following endpoints: * Attach Documents to Individual Customer * Attach Documents to Business Customer * Attach Documents to Business Customer V2 * Attach Document To Associated Party * Attach Document To Associated Party V2 ## OpenAPI ````yaml PATCH /v1/customers/{customer_id} openapi: 3.1.0 info: title: Fin.com API version: 1.0.0 description: A simple API specification servers: - url: https://sandbox.api.fin.com description: Sandbox server - url: https://api.fin.com description: Production server security: [] tags: - name: Authentication description: A modified OAuth 2.0 Client Credential Flow - name: Customers description: Customer management and document upload operations - name: Balances description: Retrieve wallet balance information - name: Catalogue description: | A set of endpoints to retrieve contextual data to assemble requests to fin.com's API - name: Beneficiaries description: Manage beneficiary accounts for payments and transfers - name: Transactions description: Transaction history and management for beneficiaries - name: Virtual Accounts description: Create and manage virtual accounts for USD to USDC conversions - name: Fees & FX Rates description: Retrieve fees and foreign exchange rates paths: /v1/customers/{customer_id}: patch: tags: - Customers summary: Update Customer description: >- Submit an RFI response for an individual or business customer. You must pass only the fields and documents specified in the RFI — submitting data that was not requested will trigger an error. parameters: - name: customer_id in: path required: true schema: type: string format: uuid description: Unique identifier of the customer to update example: ed54db74-7dbe-47d2-8ea0-c2bf2a9dda06 requestBody: required: true content: application/json: schema: oneOf: - title: Individual Customer type: object properties: proof_of_identity: type: object properties: type: type: string example: PASSPORT number: type: string example: A12345678 country: type: string example: USA issue_date: type: string format: date example: '2020-01-15' expiry_date: type: string format: date example: '2030-01-15' files: type: array items: type: object properties: uri: type: string example: /AbAcQ4hn_0652746727637.pdf side: type: string enum: - FRONT - BACK example: FRONT proof_of_address: type: object description: >- The proof of address document must not be older than three months. properties: type: type: string example: UTILITY_BILL country: type: string example: USA files: type: array items: type: object properties: uri: type: string example: /AbAcQ4hn_0652746727638.pdf - title: Business Customer type: object properties: ownership_documents: type: array description: >- Ownership documents for the business customer (e.g. shareholder registry, proof of signatory authority) items: type: object properties: type: type: string example: PROOF_OF_SIGNATORY_AUTHORITY description: type: string example: Shareholder Registry files: type: array items: type: object properties: uri: type: string example: /AbAcQ4hn_0652746727639.pdf formation_documents: type: array description: >- Formation documents for the business customer (e.g. certificate of incorporation, registration document) items: type: object properties: type: type: string example: REGISTRATION_DOCUMENT description: type: string example: Certificate of Incorporation files: type: array items: type: object properties: uri: type: string example: /AbAcQ4hn_0652746727637.pdf supporting_documents: type: array description: Supporting documents for the customer items: type: object properties: type: type: string example: PROOF_OF_SOURCE_OF_FUNDS description: type: string example: Proof of source of funds doc files: type: array items: type: object properties: uri: type: string example: /PoAdef45_0652746727640.pdf associated_party_attachments: type: array description: >- Document attachments for associated parties of a business customer items: type: object properties: associated_party_id: type: string format: uuid description: ID of the associated party example: f6b13e01-044a-4f74-a70b-d5f66b6449af identifying_documents: type: array items: type: object properties: type: type: string enum: - PASSPORT - NATIONAL_ID - DRIVERS_LICENSE - RESIDENCE_PERMIT number: type: string country: type: string issue_date: type: string format: date expiry_date: type: string format: date files: type: array items: type: object properties: side: type: string enum: - FRONT - BACK uri: type: string address_documents: type: array items: type: object properties: type: type: string files: type: array items: type: object properties: uri: type: string supporting_documents: type: array items: type: object examples: Business Customer: value: ownership_documents: - type: PROOF_OF_SIGNATORY_AUTHORITY description: Shareholder Registry files: - uri: /AbAcQ4hn_0652746727639.pdf formation_documents: - type: REGISTRATION_DOCUMENT description: Certificate of Incorporation files: - uri: /AbAcQ4hn_0652746727637.pdf supporting_documents: - type: PROOF_OF_SOURCE_OF_FUNDS description: Proof of source of funds doc files: - uri: /PoAdef45_0652746727640.pdf associated_party_attachments: - associated_party_id: f6b13e01-044a-4f74-a70b-d5f66b6449af identifying_documents: - type: PASSPORT number: A12345678 country: USA issue_date: '2020-01-15' expiry_date: '2030-01-15' files: - uri: /AbAcQ4hn_0652746727637.pdf - type: DRIVERS_LICENSE number: DL987654321 country: USA issue_date: '2019-06-01' expiry_date: '2029-06-01' files: - side: FRONT uri: /AbAcQ4hn_0652746727645.pdf - side: BACK uri: /AbAcQ4hn_0652746727646.pdf address_documents: - type: BANK_STATEMENT files: - uri: /AbAcQ4hn_0652746727638.pdf supporting_documents: [] - associated_party_id: f71dc19f-b9a0-49fb-bd2d-5add3c01626e identifying_documents: - type: NATIONAL_ID number: NID-987654 country: USA issue_date: '2021-03-10' expiry_date: '2031-03-10' files: - side: FRONT uri: /XyZ123mn_0652746727650.pdf - side: BACK uri: /XyZ123mn_0652746727651.pdf address_documents: - type: UTILITY_BILL files: - uri: /XyZ123mn_0652746727652.pdf Individual Customer: value: proof_of_identity: type: PASSPORT number: A12345678 country: USA issue_date: '2020-01-15' expiry_date: '2030-01-15' files: - uri: /AbAcQ4hn_0652746727637.pdf side: FRONT proof_of_address: type: UTILITY_BILL country: USA files: - uri: /AbAcQ4hn_0652746727638.pdf responses: '200': description: Customer updated successfully content: application/json: schema: type: object properties: data: type: object properties: customer_id: type: string format: uuid example: ed54db74-7dbe-47d2-8ea0-c2bf2a9dda06 example: data: customer_id: ed54db74-7dbe-47d2-8ea0-c2bf2a9dda06 '400': description: Validation failed content: application/json: schema: type: object properties: status: type: integer example: 400 message: type: string example: Validation failed data: type: object additionalProperties: type: string '401': $ref: '#/components/responses/AuthenticationError' '404': $ref: '#/components/responses/NotFoundError' '422': $ref: '#/components/responses/ValidationError' security: - bearerAuth: [] components: responses: AuthenticationError: description: Authentication failed due to invalid credentials content: application/json: schema: type: object properties: message: type: string example: Authentication failed NotFoundError: description: Resource not found content: application/json: schema: type: object properties: message: type: string example: Resource not found ValidationError: description: Failed due to a formatting error. content: application/json: schema: type: object required: - message properties: message: type: string errors: type: array items: type: object additionalProperties: type: string securitySchemes: bearerAuth: type: http scheme: bearer bearerFormat: JWT description: >- Bearer token authentication. Obtain token from [Issue a Token](https://developer.fin.com/api-reference/authentication/issue-a-token) endpoint ````