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

# List posted customer payment receipts with no bank reconciliation match

> <Note>Required API key scope: `accounting:read`</Note>

Returns paginated `order_payments` that are in a posted / succeeded /
partial_refund status AND have no corresponding
`accounting.bank_transactions.matched_order_payment_id` link.

Industry analog: QuickBooks **Payments to Deposit** list.

**Scope:** ACH, wire, external, check, and cash payment methods.

**Multi-invoice payments:** payments applied across multiple invoices via
`order_payment_applications` are included. The `applications` array on each
row shows the per-invoice breakdown.

**ADDITIVE:** Does NOT affect `getARAging`, `getARStatement`, or
`getARSummary`. Read-only view over `order_payments`.

**Layer 1 isolation:** `entity_id` always from the API key; `account_id`
is an optional secondary filter.




## OpenAPI

````yaml /openapi.yaml get /accounting/unmatched-receipts
openapi: 3.1.0
info:
  title: Arcus ERP Public API
  version: 1.0.0
  description: >
    Arcus ERP public REST API. Designed for external integrations and data
    migration.


    **Authentication.** Bearer token (API key) via the `Authorization` header.

    Format: `Authorization: Bearer ark_live_ent_<code>_<random>` (or
    `ark_test_*` for sandbox).

    API keys are issued per-entity in **Settings > Developers > API Keys**.


    **Entity scoping.** The entity is encoded in the API key prefix; routes are
    flat

    (e.g. `/v1/accounts`, `/v1/orders`, `/v1/products`). A small set of platform
    endpoints

    (migration, reconciliation, events, webhook endpoints, API keys) use the

    `/v1/entities/{entity_id}/...` form -- those are noted in their tags.


    **Key capabilities.**
      - Related-resource hydration via `?expand[]=` (see `x-arcus-expand` on each resource).
      - Cursor-based pagination (`starting_after` / `ending_before` / `limit`).
      - Idempotency via the `Idempotency-Key` header.
      - Webhook events for asynchronous notification.
      - Conditional requests / ETag for cache validation.
servers:
  - url: https://api.arcuserp.com/v1
    description: Arcus ERP API (accepts both live `ark_live_*` and test `ark_test_*` keys)
  - url: https://dev-api.arcuserp.com/v1
    description: >-
      Dev sandbox API (test-only data, accepts `ark_test_*` keys against dev
      RDS)
security: []
paths:
  /accounting/unmatched-receipts:
    get:
      tags:
        - Accounting
      summary: List posted customer payment receipts with no bank reconciliation match
      description: >
        <Note>Required API key scope: `accounting:read`</Note>


        Returns paginated `order_payments` that are in a posted / succeeded /

        partial_refund status AND have no corresponding

        `accounting.bank_transactions.matched_order_payment_id` link.


        Industry analog: QuickBooks **Payments to Deposit** list.


        **Scope:** ACH, wire, external, check, and cash payment methods.


        **Multi-invoice payments:** payments applied across multiple invoices
        via

        `order_payment_applications` are included. The `applications` array on
        each

        row shows the per-invoice breakdown.


        **ADDITIVE:** Does NOT affect `getARAging`, `getARStatement`, or

        `getARSummary`. Read-only view over `order_payments`.


        **Layer 1 isolation:** `entity_id` always from the API key; `account_id`

        is an optional secondary filter.
      operationId: listUnmatchedReceiptsV1
      parameters:
        - name: account_id
          in: query
          required: false
          schema:
            type: string
            format: uuid
          description: Filter to a specific customer account
        - name: page
          in: query
          required: false
          schema:
            type: integer
            default: 1
        - name: per_page
          in: query
          required: false
          schema:
            type: integer
            default: 50
            maximum: 200
        - name: date_from
          in: query
          required: false
          schema:
            type: string
            format: date
          description: Filter receipts on or after this date (YYYY-MM-DD)
        - name: date_to
          in: query
          required: false
          schema:
            type: string
            format: date
          description: Filter receipts on or before this date (YYYY-MM-DD)
      responses:
        '200':
          description: Paginated list of unmatched receipts
          content:
            application/json:
              schema:
                type: object
                properties:
                  data:
                    type: array
                    items:
                      type: object
                      properties:
                        id:
                          type: string
                          format: uuid
                        order_id:
                          type: string
                          format: uuid
                          nullable: true
                        order_number:
                          type: string
                          nullable: true
                        account_id:
                          type: string
                          format: uuid
                          nullable: true
                        account_name:
                          type: string
                          nullable: true
                        amount:
                          type: number
                        payment_method:
                          type: string
                        status:
                          type: string
                        posted_at:
                          type: string
                          format: date-time
                          nullable: true
                        check_number:
                          type: string
                          nullable: true
                        external_reference:
                          type: string
                          nullable: true
                        is_multi_application:
                          type: boolean
                        applications:
                          type: array
                          items:
                            type: object
                            properties:
                              order_id:
                                type: string
                                format: uuid
                              order_number:
                                type: string
                                nullable: true
                              amount_applied:
                                type: number
                  total:
                    type: integer
                  page:
                    type: integer
                  per_page:
                    type: integer
        '400':
          $ref: '#/components/responses/Error'
        '401':
          $ref: '#/components/responses/Error'
        '403':
          $ref: '#/components/responses/Error'
      security:
        - ApiKeyAuth: []
components:
  responses:
    Error:
      description: Error response (400/401/403/404/409/422/429/500)
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/ErrorEnvelope'
  schemas:
    ErrorEnvelope:
      type: object
      description: |
        Canonical error response envelope. All API errors use this shape.
      required:
        - error
        - code
      properties:
        error:
          type: string
          description: Machine-readable error key
          example: not_found
        code:
          type: string
          description: Machine-readable error code (often same as error)
          example: not_found
        type:
          type: string
          enum:
            - validation_error
            - permission_error
            - not_found
            - conflict
            - rate_limit
            - internal
            - expand_error
            - not_implemented
          example: not_found
        hint:
          type: string
          description: Human-readable one-sentence explanation (English)
          example: >-
            The requested order does not exist or does not belong to this
            entity.
        param:
          type: string
          description: The parameter that caused the error, if applicable
          example: expand[0]
        required:
          type: string
          description: The scope required (only on insufficient_scope errors)
          example: accounts:read
        request_id:
          type: string
          description: >-
            Unique request ID for support tracing (maps to CloudWatch log
            stream)
          example: req_abc123
  securitySchemes:
    ApiKeyAuth:
      type: http
      scheme: bearer
      description: |
        API key issued per entity via Settings > Developers > API Keys.
        Each key carries scopes (e.g. orders:read, products:write).
        Bearer token format: Authorization: Bearer ark_live_ent_<code>_<random>
        Test keys use ark_test_ent_<code>_<random>. Both are issued per entity
        via Settings > Developers > API Keys.

````