> ## Documentation Index > Fetch the complete documentation index at: https://docs-beta.layerfi.com/llms.txt > Use this file to discover all available pages before exploring further. # Fetch AR aging detail for a customer > Returns detailed accounts receivable aging information for a specific customer, including outstanding balances broken down by aging buckets (current, 1-30 days, 31-60 days, 61-90 days, 91+ days). ## OpenAPI ````yaml get /v1/businesses/{businessId}/invoices/ar-aging/customer/{customerId} openapi: 3.0.1 info: title: API version: latest servers: [] security: - BearerAuth: [] tags: [] externalDocs: url: / paths: /v1/businesses/{businessId}/invoices/ar-aging/customer/{customerId}: get: tags: [] summary: Fetch AR aging detail for a customer description: >- Returns detailed accounts receivable aging information for a specific customer, including outstanding balances broken down by aging buckets (current, 1-30 days, 31-60 days, 61-90 days, 91+ days). operationId: business.invoices.ar-aging.customer.get parameters: - name: businessId in: path description: The UUID of the business to fetch the AR aging detail for required: true schema: type: string format: uuid - name: customerId in: path description: The UUID of the customer to fetch AR aging detail for required: true schema: type: string format: uuid - name: effective_date in: query description: >- The date to calculate aging from. Invoices are aged based on their due date relative to this date. Defaults to today if not specified. ISO 8601 date format. schema: type: string format: date-time - name: Content-Type in: header description: Content-Type must be set to application/json schema: type: string responses: '200': description: AR aging customer detail retrieved successfully headers: {} content: application/json: schema: $ref: '#/components/schemas/ARAgingCustomerDetailResponse' '404': description: Business or customer not found content: application/json: schema: $ref: '#/components/schemas/ApiError' deprecated: false components: schemas: ARAgingCustomerDetailResponse: type: object description: Detailed AR aging information for a specific customer properties: type: type: string enum: - AR_Aging_Customer_Detail description: Type identifier for this response as_of_date: type: string format: date-time nullable: true description: The effective date used to calculate aging buckets customer: $ref: '#/components/schemas/ApiCustomerData' description: The customer details buckets: type: array items: $ref: '#/components/schemas/ARAgingCustomerDetailBucket' description: Detailed breakdown of outstanding balances by aging bucket current: type: integer format: int64 description: Total outstanding balance for invoices not yet past due in cents days_1_30: type: integer format: int64 description: Total outstanding balance for invoices 1-30 days past due in cents days_31_60: type: integer format: int64 description: Total outstanding balance for invoices 31-60 days past due in cents days_61_90: type: integer format: int64 description: Total outstanding balance for invoices 61-90 days past due in cents days_91_over: type: integer format: int64 description: Total outstanding balance for invoices 91+ days past due in cents total: type: integer format: int64 description: Total outstanding balance across all aging buckets in cents ApiError: type: object properties: {} example: '' description: '' ApiCustomerData: type: object properties: id: type: string format: uuid description: Unique identifier for the customer. external_id: type: string description: >- Unique ID of the customer in your system for linking purposes. **Idempotency key**. example: '31415926535' individual_name: type: string nullable: true description: >- Full name of the individual customer or contact at a corporate customer. company_name: type: string nullable: true description: Name of the company customer. email: type: string nullable: true description: Email address of the customer. mobile_phone: type: string nullable: true description: Mobile phone number of the customer. office_phone: type: string nullable: true description: Office phone number of the customer. address_string: type: string nullable: true description: Address of the customer. memo: type: string nullable: true description: >- Memo for any text you would like to associate with the customer (for example, to display to end users). status: type: string description: 'Status of the customer. Possible values: `ACTIVE`, `ARCHIVED`.' example: ACTIVE transaction_tags: type: array items: $ref: '#/components/schemas/ApiTag' ARAgingCustomerDetailBucket: type: object description: A bucket containing outstanding balance for a specific aging period properties: start_day_number: type: integer nullable: true description: >- Start day of the aging bucket (e.g., 1 for 1-30 days). Null for current/not-yet-due invoices. end_day_number: type: integer nullable: true description: >- End day of the aging bucket (e.g., 30 for 1-30 days). Null for open-ended buckets (e.g., 91+ days). outstanding_value: type: integer format: int64 description: Outstanding balance for this aging bucket in cents ApiTag: type: object properties: id: type: string format: uuid description: ID for the tag key: type: string description: Key for the tag example: ExampleTagKey dimension_display_name: type: string nullable: true description: Display name for the tag dimension value: type: string description: Value for the tag example: ExampleTagValue value_display_name: type: string nullable: true description: Display name for the tag value definition dimension_id: type: string format: uuid description: ID of the tag dimension this tag belongs to definition_id: type: string format: uuid description: ID of the tag value definition archived_at: type: string format: date-time nullable: true description: When the tag was archived required: - id - key - value - dimension_id - definition_id securitySchemes: BearerAuth: type: http scheme: bearer bearerFormat: JWT ````