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

# Update a purchase invoice note

> Replaces the text of a purchase invoice note and returns it under `note`.

Changes the note's text. Send a multipart form with the new text as the `note` field and, optionally, a file to attach. The updated note comes back under `note`.

> [!NOTE]
>
> The SDK samples get their client from credentials your app registers once when it starts, as shown in [Authentication](https://exsited.mintlify.site/authentication.md#set-up-a-client). To try the call here, click **Try it**, set `host` to your Exsited API host name and paste an access token from [Get an access token](https://exsited.mintlify.site/api-reference/authentication/get-an-access-token.md).


## OpenAPI

````yaml PATCH /purchase_invoices/{purchase_invoice_id}/notes/{note_id}
openapi: 3.1.0
info:
  title: Exsited API
  version: v4
servers:
  - url: https://{host}/api/v4
    variables:
      host:
        default: your-api-host.example.com
        description: Your Exsited API host name, without https://.
security:
  - bearerAuth: []
tags:
  - name: Authentication
  - name: Accounts
  - name: Account emails
  - name: Account groups
  - name: Communications
  - name: Communication profiles
  - name: Orders
  - name: Quote orders
  - name: Express
  - name: Usages
  - name: Sales reps
  - name: Gift certificates
  - name: Invoices
  - name: Pro-forma invoices
  - name: Payments
  - name: Refunds
  - name: Credit notes
  - name: Credit note applications
  - name: Reconciliations
  - name: Items
  - name: Inventory adjustments
  - name: Units of measurement
  - name: Zones
  - name: Shipping packages
  - name: Shipping rules
  - name: Fulfillment profiles
  - name: Fulfillment terms
  - name: Item fulfillments
  - name: Item receipts
  - name: Bookings
  - name: Rental assets
  - name: Return merchandise authorisations
  - name: Purchase orders
  - name: Purchase invoices
  - name: Purchase payments
  - name: Purchase refunds
  - name: Purchase credit notes
  - name: Purchase credit note applications
  - name: Purchase express
  - name: Return vendor authorizations
  - name: ABA files
  - name: Receive terms
  - name: Labours
  - name: Tasks
  - name: Timesheets
  - name: Milestones
  - name: Employees
  - name: Departments
  - name: Designations
  - name: Teams
  - name: Time periods
  - name: Workflows
  - name: Workflow settings
  - name: Events
  - name: Custom events
  - name: System events
  - name: Approvals
  - name: Approval profiles
  - name: Approval user groups
  - name: Alerts
  - name: Alert responsibility settings
  - name: Alert responsibilities
  - name: Action scripts
  - name: Note groups
  - name: Note attachments
  - name: Instance settings
  - name: Accounting codes
  - name: Additional codes
  - name: Billing periods
  - name: Charging periods
  - name: Pricing periods
  - name: Invoice terms
  - name: Days of the month
  - name: Countries
  - name: Salutations
  - name: Document templates
  - name: Email templates
  - name: Roles
  - name: Operators
  - name: Operator groups
  - name: User settings
  - name: Custom attributes
  - name: Custom components
  - name: Custom features
  - name: Custom fields
  - name: Custom forms
  - name: Attribute attachments
  - name: Portal
  - name: Integration connections
  - name: External databases
  - name: Reports
  - name: Applications
  - name: Organisation
  - name: Child organisations
  - name: Webhooks
paths:
  /purchase_invoices/{purchase_invoice_id}/notes/{note_id}:
    patch:
      tags:
        - Purchase invoices
      summary: Update a purchase invoice note
      description: >-
        Changes the note's text. Send a multipart form with the new text as the
        `note` field and, optionally, a file to attach. The updated note comes
        back under `note`.
      operationId: purchase_invoices_update_purchase_invoice_note
      parameters:
        - name: purchase_invoice_id
          in: path
          required: true
          description: The purchase invoice's `id`.
          schema:
            type: string
        - name: note_id
          in: path
          required: true
          description: The note's `id`, from the note create or the notes list.
          schema:
            type: string
      requestBody:
        required: true
        content:
          multipart/form-data:
            schema:
              type: object
              required:
                - note
              properties:
                note:
                  type: string
                  description: The new note text. HTML is accepted.
                file:
                  type: string
                  format: binary
                  description: An optional file to attach to the note.
      responses:
        '200':
          description: The updated note, under `note`.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/PurchaseInvoiceNoteUpdatedResponse'
      x-codeSamples:
        - lang: bash
          label: cURL
          source: >-
            curl -X PATCH
            "$EXSITED_BASE_URL/api/v4/purchase_invoices/PI-0001/notes/note_8d1e2f3a4b5c4d6e8f9a0b1c2d3e4f5a"
            \
              -H "Authorization: Bearer $ACCESS_TOKEN" \
              --form-string 'note=<p>Goods received in full.</p>' \
              -F "file=@delivery-note.pdf"
        - lang: python
          label: Python
          source: |
            from exsited import build_client

            client = build_client()

            response = client.purchase_invoices.update_purchase_invoice_note(
                "PI-0001",
                "note_8d1e2f3a4b5c4d6e8f9a0b1c2d3e4f5a",
                "<p>Goods received in full.</p>",
                files={"file": open("delivery-note.pdf", "rb")},
            )
            print(response.data)
        - lang: javascript
          label: JavaScript
          source: >
            import {readFileSync} from 'node:fs';

            import {buildClient} from 'exsited';


            const client = await buildClient();


            const response = await
            client.purchaseInvoices.updatePurchaseInvoiceNote(
                'PI-0001',
                'note_8d1e2f3a4b5c4d6e8f9a0b1c2d3e4f5a',
                '<p>Goods received in full.</p>',
                {files: {file: ['delivery-note.pdf', readFileSync('delivery-note.pdf')]}},
            );

            console.log(response.data);
        - lang: php
          label: PHP
          source: |
            use Exsited\Client\ClientRegistry;

            $client = ClientRegistry::buildClient();

            $response = $client->purchaseInvoices->updatePurchaseInvoiceNote(
                'PI-0001',
                'note_8d1e2f3a4b5c4d6e8f9a0b1c2d3e4f5a',
                '<p>Goods received in full.</p>',
                ['file' => ['delivery-note.pdf', fopen('delivery-note.pdf', 'r')]],
            );
            print_r($response->data);
        - lang: java
          label: Java
          source: >
            import com.exsited.client.ApiResponse;

            import com.exsited.client.ClientRegistry;

            import com.exsited.client.ExsitedClient;

            import com.exsited.client.RequestOptions;

            import
            com.exsited.resources.purchase_invoices.purchase_invoices_dto.PurchaseInvoicesDto.PurchaseInvoiceNoteUpdated;

            import java.nio.file.Path;

            import java.util.Map;


            ExsitedClient client = ClientRegistry.buildClient();


            ApiResponse<PurchaseInvoiceNoteUpdated> response =
            client.purchaseInvoices().updatePurchaseInvoiceNote(
                    "PI-0001",
                    "note_8d1e2f3a4b5c4d6e8f9a0b1c2d3e4f5a",
                    "<p>Goods received in full.</p>",
                    Map.of("file", Path.of("delivery-note.pdf")),
                    RequestOptions.none());
            System.out.println(response.getMap());
        - lang: csharp
          label: .NET
          source: >
            using Exsited.Client;


            await using var client = ExsitedClient.BuildClient();


            var response = await
            client.PurchaseInvoices.UpdatePurchaseInvoiceNoteAsync(
                "PI-0001",
                "note_8d1e2f3a4b5c4d6e8f9a0b1c2d3e4f5a",
                "<p>Goods received in full.</p>",
                new Dictionary<string, object?> { ["file"] = new object?[] { "delivery-note.pdf", File.ReadAllBytes("delivery-note.pdf") } });

            Console.WriteLine(response.Json);
        - lang: dart
          label: Dart
          source: >
            import 'dart:io';


            import 'package:exsited/exsited.dart';


            final client = buildClient();


            final response = await
            client.purchaseInvoices.updatePurchaseInvoiceNote(
              'PI-0001',
              'note_8d1e2f3a4b5c4d6e8f9a0b1c2d3e4f5a',
              '<p>Goods received in full.</p>',
              files: {
                'file': [
                  'delivery-note.pdf',
                  File('delivery-note.pdf').readAsBytesSync(),
                ],
              },
            );

            print(response.map);
        - lang: go
          label: Go
          source: "import (\n\t\"context\"\n\t\"fmt\"\n\t\"log\"\n\t\"os\"\n\n\texsited \"github.com/exsited/exsited-sdk-go/v4\"\n)\n\nclient, err := exsited.BuildClient(nil)\nif err != nil {\n\tlog.Fatal(err)\n}\ndefer client.Close()\n\nfile, err := os.ReadFile(\"delivery-note.pdf\")\nif err != nil {\n\tlog.Fatal(err)\n}\nresponse, err := client.PurchaseInvoices().UpdatePurchaseInvoiceNote(context.Background(), \"PI-0001\", \"note_8d1e2f3a4b5c4d6e8f9a0b1c2d3e4f5a\", \"<p>Goods received in full.</p>\", map[string]any{\"file\": []any{\"delivery-note.pdf\", file}}, nil)\nif err != nil {\n\tlog.Fatal(err)\n}\nfmt.Println(response.Map)\n"
components:
  schemas:
    PurchaseInvoiceNoteUpdatedResponse:
      type: object
      properties:
        note:
          $ref: '#/components/schemas/PurchaseInvoiceNoteUpdated'
    PurchaseInvoiceNoteUpdated:
      type: object
      properties:
        attachments:
          type: array
          items: {}
        content:
          type: string
        created_by:
          $ref: '#/components/schemas/PurchaseInvoiceNoteUpdatedCreatedBy'
        created_on:
          type: string
        group: {}
        href:
          type: string
        id:
          type: string
        last_updated_by:
          $ref: '#/components/schemas/PurchaseInvoiceNoteUpdatedLastUpdatedBy'
        last_updated_on:
          type: string
        object:
          type: string
        purchase_invoice:
          $ref: '#/components/schemas/PurchaseInvoiceNoteUpdatedDetail'
        user: {}
        version:
          type: integer
        watchers:
          type: array
          items: {}
    PurchaseInvoiceNoteUpdatedCreatedBy:
      type: object
      properties:
        name:
          type: string
        object:
          type: string
    PurchaseInvoiceNoteUpdatedLastUpdatedBy:
      type: object
      properties:
        name:
          type: string
        object:
          type: string
    PurchaseInvoiceNoteUpdatedDetail:
      type: object
      properties:
        href:
          type: string
        id:
          type: string
        object:
          type: string
  securitySchemes:
    bearerAuth:
      type: http
      scheme: bearer
      description: >-
        An access token from `POST /api/v4/oauth2/token`. The SDKs get and renew
        it for you.

````

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