> ## Documentation Index > Fetch the complete documentation index at: https://docs.flowpayroll.ai/llms.txt > Use this file to discover all available pages before exploring further. # Delete Invoice Attachment > Deletes an attachment from an open invoice. Returns the updated invoice. ## OpenAPI ````yaml /api-reference/specs/billing.json delete /invoices/{clientId}/{invoiceId}/attachments/{attachmentId} openapi: 3.0.1 info: title: Billing Service description: Billing API for FlowPayroll contact: name: FlowPayroll email: support@flowpayroll.com version: v1 servers: - url: https://api.sandbox.flowpayroll.ai/v1/billing security: - X-Auth-Token: [] tags: - name: Account codes description: Create, update, archive, and delete accounting ledger codes. - name: Tax rates description: Manage default and custom tax rates. - name: Invoice & credit note templates description: >- Configure invoice and credit note templates, and list the available reference and description tokens. - name: Finance defaults description: >- Organisation finance defaults, pay element mappings, and attachment limits. - name: Invoices - name: Credit Notes - name: Clients - name: Integrations - name: Accounting Sync paths: /invoices/{clientId}/{invoiceId}/attachments/{attachmentId}: delete: tags: - Invoices summary: Delete Invoice Attachment description: Deletes an attachment from an open invoice. Returns the updated invoice. operationId: DeleteInvoiceAttachment parameters: - name: clientId in: path required: true schema: type: string - name: invoiceId in: path required: true schema: type: string - name: attachmentId in: path required: true schema: type: string responses: '200': description: OK content: application/json: schema: $ref: '#/components/schemas/ApiResponse_InvoiceDto' '404': description: Not Found content: application/json: schema: $ref: '#/components/schemas/ApiResponse_String' components: schemas: ApiResponse_InvoiceDto: type: object properties: content: $ref: '#/components/schemas/Content_InvoiceDto' metadata: $ref: '#/components/schemas/Metadata' errors: type: array items: $ref: '#/components/schemas/Error' nullable: true message: $ref: '#/components/schemas/Message' additionalProperties: false ApiResponse_String: type: object properties: content: $ref: '#/components/schemas/Content_String' metadata: $ref: '#/components/schemas/Metadata' errors: type: array items: $ref: '#/components/schemas/Error' nullable: true message: $ref: '#/components/schemas/Message' additionalProperties: false Content_InvoiceDto: type: object properties: data: $ref: '#/components/schemas/InvoiceDto' metadata: $ref: '#/components/schemas/Metadata' additionalProperties: false Metadata: type: object properties: dateFormat: type: string nullable: true dateTimeFormat: type: string nullable: true additionalProperties: false Error: type: object properties: field: type: string nullable: true reasonText: type: string nullable: true reasonId: type: string nullable: true reasonParameters: type: array items: $ref: '#/components/schemas/Pair' nullable: true additionalProperties: false Message: type: object properties: text: type: string nullable: true textId: type: string nullable: true textParameters: type: array items: $ref: '#/components/schemas/Pair' nullable: true additionalProperties: false Content_String: type: object properties: data: type: string nullable: true metadata: $ref: '#/components/schemas/Metadata' additionalProperties: false InvoiceDto: type: object properties: id: type: string organisationId: type: string clientId: type: string amount: type: number format: double nullable: true lineAmountTypes: type: string nullable: true subTotal: type: number format: double nullable: true totalTax: type: number format: double nullable: true totalCreditAmount: type: number format: double nullable: true balanceDue: type: number format: double nullable: true currencyCode: type: string nullable: true appliedCredits: type: array items: $ref: '#/components/schemas/AppliedCreditDto' nullable: true status: enum: - Draft - Issued - Paid - Voided type: string invoiceFormat: enum: - None - Date - PayElementId - PoNumber - TagGroup - PayrollConfigId type: string groupingKey: type: string invoiceFormatTagGroup: type: string nullable: true invoiceFormatTagName: type: string nullable: true date: type: string nullable: true dueDate: type: string nullable: true invoiceNumber: type: string nullable: true reference: type: string nullable: true invoiceType: enum: - Sales - Purchase type: string attachments: type: array items: $ref: '#/components/schemas/DocumentAttachmentDto' nullable: true lineItemAttachmentCount: type: integer format: int32 linesWithoutAttachmentsCount: type: integer format: int32 linesWithoutPoNumberCount: type: integer format: int32 lineItems: type: array items: $ref: '#/components/schemas/InvoiceLineItemDto' nullable: true subtotalGroups: type: array items: $ref: '#/components/schemas/SubtotalGroupDto' nullable: true tags: type: array items: $ref: '#/components/schemas/TagDto' nullable: true externalId: type: string nullable: true externalProvider: type: string nullable: true lastSyncedAt: type: string nullable: true syncStatus: type: string nullable: true syncErrorMessage: type: string nullable: true syncErrorCode: type: string nullable: true externalProviderStatus: type: string nullable: true emailSent: type: boolean emailSentAt: type: string nullable: true emailSentBy: type: string nullable: true createdDate: type: string createdBy: type: string updatedDate: type: string updatedBy: type: string additionalProperties: false Pair: type: object properties: key: type: string nullable: true value: type: string nullable: true additionalProperties: false AppliedCreditDto: type: object properties: creditNoteId: type: string amountApplied: type: number format: double appliedDate: type: string additionalProperties: false DocumentAttachmentDto: type: object properties: id: type: string fileName: type: string url: type: string nullable: true description: type: string nullable: true s3Key: type: string nullable: true contentType: type: string nullable: true fileSize: type: integer format: int64 nullable: true uploadedDate: type: string nullable: true uploadedBy: type: string nullable: true downloadUrl: type: string nullable: true downloadUrlExpiresAt: type: string nullable: true additionalProperties: false InvoiceLineItemDto: type: object properties: id: type: string invoiceId: type: string organisationId: type: string nullable: true clientId: type: string nullable: true employeeId: type: string nullable: true employeeName: type: string nullable: true description: type: string amount: type: number format: double payElementId: type: string nullable: true units: type: number format: double nullable: true chargeRate: type: number format: double nullable: true chargeUnits: type: number format: double nullable: true chargeValue: type: number format: double nullable: true date: type: string nullable: true tags: type: array items: $ref: '#/components/schemas/TagDto' nullable: true createdDate: type: string nullable: true createdBy: type: string nullable: true attachments: type: array items: $ref: '#/components/schemas/InvoiceLineItemAttachmentDto' nullable: true payElementDescription: type: string nullable: true accountCode: type: string nullable: true taxType: type: string nullable: true quantity: type: number format: double nullable: true unitAmount: type: number format: double nullable: true lineAmount: type: number format: double nullable: true taxAmount: type: number format: double nullable: true poNumber: type: string nullable: true additionalProperties: false SubtotalGroupDto: type: object properties: label: type: string amount: type: number format: double taxAmount: type: number format: double totalAmount: type: number format: double sortOrder: type: integer format: int32 additionalProperties: false TagDto: type: object properties: name: type: string group: type: string value: type: string additionalProperties: false InvoiceLineItemAttachmentDto: type: object properties: id: type: string lineItemId: type: string filename: type: string contentType: type: string fileSize: type: integer format: int64 uploadedDate: type: string uploadedBy: type: string s3Key: type: string nullable: true source: type: string nullable: true downloadUrl: type: string nullable: true downloadUrlExpiresAt: type: string nullable: true additionalProperties: false securitySchemes: X-Auth-Token: type: apiKey description: Authentication token for API access name: X-Auth-Token in: header ````