> ## 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.

# Amend a gift certificate's balance

> Sets a new remaining balance on a gift certificate and returns it under `gift_certificate`.

Send `new_balance` under `gift_certificate`; it is the one field this call takes. A balance below the amount already used returns `400`.

> [!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). To send a raw JSON body instead of filling in fields, copy the cURL sample and edit its `-d` payload.


## OpenAPI

````yaml POST /gift_certificates/{gc_id}/amend
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:
  /gift_certificates/{gc_id}/amend:
    post:
      tags:
        - Gift certificates
      summary: Amend a gift certificate's balance
      description: >-
        Send `new_balance` under `gift_certificate`; it is the one field this
        call takes. A balance below the amount already used returns `400`.
      operationId: gift_certificates_amend_gift_certificate
      parameters:
        - name: gc_id
          in: path
          required: true
          description: The gift certificate's `id`.
          schema:
            type: string
      requestBody:
        required: true
        content:
          application/json:
            schema:
              type: object
              properties:
                gift_certificate:
                  type: object
                  properties:
                    new_balance:
                      type: string
                      description: The balance to set, as a decimal string such as `7.00`.
                  required:
                    - new_balance
              required:
                - gift_certificate
            example:
              gift_certificate:
                new_balance: '7.00'
      responses:
        '200':
          description: The gift certificate with its new balance, under `gift_certificate`.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/GiftCertificateResponse'
        '400':
          description: '`new_balance` is below the amount already used.'
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Error'
      x-codeSamples:
        - lang: bash
          label: cURL
          source: >-
            curl -X POST
            "$EXSITED_BASE_URL/api/v4/gift_certificates/gc_5b2e8f1a7c3d4e9b0a6f2c4d8e1b3a7f/amend"
            \
              -H "Authorization: Bearer $ACCESS_TOKEN" \
              -H "Content-Type: application/json" \
              -d '{
                "gift_certificate": {
                  "new_balance": "7.00"
                }
              }'
        - lang: python
          label: Python
          source: |
            from exsited import build_client

            client = build_client()

            response = client.gift_certificates.amend_gift_certificate(
                "gc_5b2e8f1a7c3d4e9b0a6f2c4d8e1b3a7f", {"gift_certificate": {"new_balance": "7.00"}}
            )
            print(response.data)
        - lang: javascript
          label: JavaScript
          source: >
            import {buildClient} from 'exsited';


            const client = await buildClient();


            const response = await
            client.giftCertificates.amendGiftCertificate('gc_5b2e8f1a7c3d4e9b0a6f2c4d8e1b3a7f',
            {
                gift_certificate: {new_balance: '7.00'},
            });

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


            $client = ClientRegistry::buildClient();


            $response =
            $client->giftCertificates->amendGiftCertificate('gc_5b2e8f1a7c3d4e9b0a6f2c4d8e1b3a7f',
            [
                'gift_certificate' => ['new_balance' => '7.00'],
            ]);

            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.resources.gift_certificates.gift_certificates_dto.GiftCertificatesDto.GiftCertificate;

            import java.util.Map;


            ExsitedClient client = ClientRegistry.buildClient();


            ApiResponse<GiftCertificate> response =
            client.giftCertificates().amendGiftCertificate(
                    "gc_5b2e8f1a7c3d4e9b0a6f2c4d8e1b3a7f",
                    Map.of("gift_certificate", Map.of("new_balance", "7.00")));
            System.out.println(response.getMap());
        - lang: csharp
          label: .NET
          source: >
            using Exsited.Client;


            await using var client = ExsitedClient.BuildClient();


            var response = await
            client.GiftCertificates.AmendGiftCertificateAsync(
                "gc_5b2e8f1a7c3d4e9b0a6f2c4d8e1b3a7f",
                new Dictionary<string, object?>
                {
                    ["gift_certificate"] = new Dictionary<string, object?>
                    {
                        ["new_balance"] = "7.00",
                    },
                });

            Console.WriteLine(response.Json);
        - lang: dart
          label: Dart
          source: |
            import 'package:exsited/exsited.dart';

            final client = buildClient();

            final response = await client.giftCertificates.amendGiftCertificate(
              'gc_5b2e8f1a7c3d4e9b0a6f2c4d8e1b3a7f',
              {
                'gift_certificate': {'new_balance': '7.00'},
              },
            );
            print(response.map);
        - lang: go
          label: Go
          source: "import (\n\t\"context\"\n\t\"fmt\"\n\t\"log\"\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\nresponse, err := client.GiftCertificates().AmendGiftCertificate(context.Background(), \"gc_5b2e8f1a7c3d4e9b0a6f2c4d8e1b3a7f\", map[string]any{\n\t\"gift_certificate\": map[string]any{\"new_balance\": \"7.00\"},\n}, nil)\nif err != nil {\n\tlog.Fatal(err)\n}\nfmt.Println(response.Map)\n"
components:
  schemas:
    GiftCertificateResponse:
      type: object
      properties:
        gift_certificate:
          $ref: '#/components/schemas/GiftCertificate'
    Error:
      type: object
      description: Every failed call returns this body.
      properties:
        object:
          type: string
          description: Always `error`.
        request_id:
          type: string
          description: Quote this to support.
        status:
          type: integer
          description: The HTTP status.
        code:
          type: string
          description: What went wrong, such as `validation_error`.
        message:
          type: string
          description: A short description of the problem.
        doc_url:
          type: string
          description: A link to more about this error.
        errors:
          type: array
          description: One entry per field that failed.
          items:
            type: object
            properties:
              field:
                type: string
              code:
                type: string
              message:
                type: string
              doc_url:
                type: string
    GiftCertificate:
      type: object
      properties:
        accounting_code:
          $ref: '#/components/schemas/GiftCertificateAccountingCode'
        activity_logs:
          type: array
          items:
            $ref: '#/components/schemas/GiftCertificateActivityLog'
        allocations:
          type: array
          items:
            $ref: '#/components/schemas/GiftCertificateAllocation'
        amount:
          type: string
        code:
          type: string
        created_by: {}
        created_on:
          type: string
        currency:
          $ref: '#/components/schemas/GiftCertificateCurrency'
        expiry_date:
          type: string
        href:
          type: string
        id:
          type: string
        issue_date:
          type: string
        last_updated_by: {}
        last_updated_on:
          type: string
        linked_item: {}
        object:
          type: string
        remaining_balance:
          type: string
        status:
          type: string
        transactions:
          type: array
          items:
            $ref: '#/components/schemas/GiftCertificateTransaction'
        used_amount:
          type: string
        version:
          type: integer
    GiftCertificateAccountingCode:
      type: object
      properties:
        object:
          type: string
        id:
          type: string
        name:
          type: string
        href:
          type: string
    GiftCertificateActivityLog:
      type: object
      properties:
        activity:
          type: string
    GiftCertificateAllocation:
      type: object
      properties:
        account:
          $ref: '#/components/schemas/GiftCertificateAllocationAccount'
        created_by: {}
        created_on:
          type: string
        date:
          type: string
        href:
          type: string
        id:
          type: string
        last_updated_by: {}
        last_updated_on:
          type: string
        object:
          type: string
        status:
          type: string
        type:
          type: string
        version:
          type: integer
    GiftCertificateCurrency:
      type: object
      properties:
        object:
          type: string
        id:
          type: string
        name:
          type: string
        href:
          type: string
    GiftCertificateTransaction:
      type: object
      properties:
        accounting_code:
          $ref: '#/components/schemas/GiftCertificateTransactionAccountingCode'
        amount:
          type: string
        created_by: {}
        created_on:
          type: string
        currency:
          $ref: '#/components/schemas/GiftCertificateTransactionCurrency'
        date:
          type: string
        href:
          type: string
        id:
          type: string
        last_updated_by: {}
        last_updated_on:
          type: string
        object:
          type: string
        reference: {}
        status:
          type: string
        type:
          type: string
        version:
          type: integer
    GiftCertificateAllocationAccount:
      type: object
      properties:
        object:
          type: string
        id:
          type: string
        name:
          type: string
        href:
          type: string
    GiftCertificateTransactionAccountingCode:
      type: object
      properties:
        object:
          type: string
        id:
          type: string
        name:
          type: string
        href:
          type: string
    GiftCertificateTransactionCurrency:
      type: object
      properties:
        object:
          type: string
        id:
          type: string
        name:
          type: string
        href:
          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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